Graphing Calculator: how does it work?

The available functions are:

neg, abs, sign
ln, log, exp, pow
sin, cos, tan, cot, sec, csc
asin, acos, atan, acot, asec, acsc,
sinh, cosh, tanh, coth, sech, csch
asinh, acosh, atanh, acoth, asech, acsch

They all take one argument, except for pow which takes 2.

It should recognize |x| as the same as abs(x), x^2 means x to the second power, and x! means X factorial. Also the constants ‘e’ and ‘pi’ are available.

To graph multiple functions, separate them with a “;” character. For example, try this input:
abs(x);0.1x^2;-4;3sin(x)

After graphing multiple equations, if you click the 5th button (that looks like an X with a green dot), it will calculate the intersections.