About inputting math
Remember to be precise and remember brackets.
Except of possible constant/functions: pi + - * / ^ sqrt() log() sin() asin() cos() acos() tan() atan()
Examples:
3xy is interpreted as 3*x*y
2pi^2 is interpreted as 2*pi^2
2(x+1) is interpreted as 2*(x+1)
2*sin(2*x) is interpreted as 2*sin(2*x)
N.B. Implicit multiplication is only enabled in some circumstances (see examples). One of the places where it is not enabled is in front of functions. E.g. is xsin(x) not valid. Instead input x*sin(x).