Graph lines - How to?
The most important thing to remember about graphing lines is that you always need some combination of the slope of the line, and/or points on the line in order to graph it.

Partial derivatives - How to solve?
Partial derivatives are just like regular derivatives, but for multivariable functions.

Pythagorean theorem - What is it?
Pythagorean theorem is a tool you’ll use all the time when you’re dealing with triangles, and you will always be dealing with triangles, no matter what math class you’re taking.

Trig substitution - How to solve?
Trigonometric substitution (more affectionately known as trig substitution, or trig sub), is another integration method you can use to simplify integrals.

Exponents - What are they?
Exponents are a fundamental math tool that you learn in Pre-algebra, but a lot of people continue to struggle with them all the way through calculus!

Graphing polar curves: lemniscates
Graphing polar curves and, more specifically, graphing circles, is a hard thing to master at first. But, with practice, it gets a lot easier, and you'll get much, much faster.