Functions: Enter a function f(x) by writing any

expression with the `x` variable. Separate multiple

graphs with semicolons.

Trig functions: `sin(x)`, `cos(x)`, `tan(x)`, `sec(x)`,

`asin(x)` (inverse sine)

Square root: `sqrt(x)`

Natural logarithm (base e): `log(x)`

Constants: `pi`, `e`

Slope Fields: Start off with the prefix `s:` and enter

an expression in terms of `x` and `y`.

Vector Fields: Use the prefix `v:` and enter an

expression in the form of `v: (f(x, y), g(x, y))`. The 2

functions of `x` and `y` inside the paranetheses are the

x- and y-components of the vector.

Polar: Use the prefix `r = ` and enter an expression in

the form of `r = f(t)`.

Parametric: Use prefix `p:` and enter in form of

`p: x = f(t), y = g(t)`.