This is an open archive from my being a Waterloo and Laurier CS/BBA student.
If you find it useful and want me to endure more pain,
consider sending me a coffee bubble tea.
Minus Stripe/PayPal’s 30¢ transaction fee, of course.
About
I make no guarantees that my work is remotely close to correct. Frankly, it’s more likely that it’s not. Please let me know if you find a mistake though! Or, in the spirit of open source, make a pull request fixing it.
If you want to use my agony
document class for \(\LaTeX\),
feel free to download it and look through the macros.
The reference sheets on this site use an adapted config for MathJax.
Everything here is published under information and belief that it is permitted by relevant faculty; please contact me if anything is not and I will take them down.
Unless otherwise specified, all content here is licensed under a Creative Commons Attribution ShareAlike 4.0 International License (CCBYSA 4.0). This means you can do whatever you want with it, provided you (1) give credit and (2) also release your work openly. Nonfree study resources behind hard paywalls suck. Learning is painful and agonizing enough as it is.
Table of Contents
Business
Quizlet flashcards are not mine: thank Imaad for them.
BUS 111 (F2020) Introduction to the Business Environment
Flashcards available for PEST factors and strategic expansion.
BUS 121 (W2021) Functional Areas of the Organization
Flashcard set (WIP) for the whole course so far.
Study materials by Ace are also published before each assessment.
Computer Science
CS 135 (F2020) Designing Functional Programs
I don’t implement the full design recipe in exercises, for obvious reasons (I’m lazy).
File  Complete?  Notes 

Module 11 Exercises  
Module 12 Exercises  
Module 13 Exercises  
Module 14 Exercises  
Module 15 Exercises  
Module 16 Exercises 
Economics
ECON 120 (F2020) Introduction to Microeconomics
No “practice”, but figured this is a nice place to host my cheat sheets. They are created on Figma, and the source files are available here.
If you just want the sheets, you can get them all at my KoFi shop (which is, as always, paywhatyouwant). They remain on this GitHub repository too.
ECON 140 (W2021) Introduction to Macroeconomics
I hastily put together an equation sheet after lecture on the 4th. Let me know if there’s mistakes.
Cheat sheets are being provided on my paywhatyouwant store. Set the price based on your marginal propensity to consume cheat sheets.
Versioning is semantic: anything that is wrong/serious bumps the major version, aesthetic changes bump the minor version.
File  Last Updated 

Test 1 Cheat Sheet  Feb 12, 8:20pm (version 2) 
Test 2 Cheat Sheet  Mar 19, 5:09pm (v2.0) 
Exam Cheat Sheet  Apr 20, 6:49pm (v0.1) 
Might also be helpful: Will put toegether a compilation of sample algebraic solution processes.
Math
MATH 135 (F2020) Algebra for Honours Mathematics
File  Complete?  Notes 

Extra Practice 1  
Extra Practice 2  
Extra Practice 3  
Extra Practice 4  Missing C01 and C02  
Extra Practice 5  
Extra Practice 6  Missing C03/05/06. RP09 by sooshi.  
Extra Practice 7  Missing C01  
Extra Practice 8  
Extra Practice 9  
Extra Practice 10  Missing C02. RP10 by sooshi.  
Extra Practice 11  Missing C01  
Fall 2018 Midterm  
Fall 2019 Midterm  
Winter 2020 Midterm  
Winter 2020 Final 
MATH 136 (W2021) Linear Algebra I for Honours Mathematics
A collection of theorems can be found here and practice problems here.
MATH 137 (F2020) Calculus I for Honours Mathematics
File  Complete?  Notes 

Practice Assignment 1  
Practice Assignment 2  
Practice Assignment 3  
Practice Assignment 4  
Practice Assignment 5  
Practice Assignment MT  Posted as Practice AssignMT on LEARN 

Practice Assignment 6  
Practice Assignment 7  
Practice Assignment 8  
Practice Assignment 9  
Practice Assignment 10  
Practice Assignment FE  
Practice Midterm 1  Posted as midterm_practice on LEARN 

Practice Final F2019 
MATH 138 (W2021) Calculus II for Honours Mathematics
A collection of theorems can be found here.
Jimmy has notes for series and Taylor series.
MATH 146 (W1989) Linear Algebra I (Advanced)
I found an old copy of my father’s Linear Algebra, 2nd edition by Hoffman and Kunze from when he was at Waterloo (and had the guts to take 14x courses). I have no idea if anyone at all would find these useful, but here are my solutions so far. Note that I use the notation from the book, which might hurt when MATH 136 starts.
Mistakes
Because it’s motivating or something, here’s a list of all of my mistakes. Hopefully it makes you feel better about yours. Thanks to everyone on the list who’ve helped me make this resource better for everyone :)
Errata corrige
 MATH135/EP04/RP04 Messed up basic arithmetic (Roy)
 MATH135/EP03/RP09 Rewrote completely incomprehensible proof (Gabriel)
 MATH135/EP03/RP05 Proved a there exists statement by exhausting the domain (Angela)
 MATH135/EP06/RP05 Got the divides relation backwards for an incoherent proof (Quan)
 MATH135/EP11/RP03(a) Forgot the quadratic formula for a moment (Caitlin)
 MATH135/EP08/RP05 Totally forgot a question entirely (Javin)
 MATH135/EP11/RP01 Obviously, 2 + 1 = 1 (sooshi)
 MATH135/EP10/RP15(b) Overcomplicated proof when it follows almost immediately from the previous question (sooshi)
 ECON120/Final (v1.0) Deadweight loss of monopoly is between MC and demand, not price and demand (Jimmy Zhan)
 ECON120/Final (v1.1) Wrong colour on tarriff supply and demand curves
 ECON140/Test 1 (v1.1) NX curve description under AE curve section, simple multiplier given as A/Y not Y/A (Trisha)
Contact
Did you find a mistake?
Reach out by filing an issue on GitHub
or by one of email,
Facebook,
Instagram,
and Discord (@retrocraft#6259
).