Format of functions

The functions can consist of ()+-*/↑, sin, cos, tan, log, int, sgn, abs, sqr, asin, acos, atan, ln and the constants a-z (without x and e) and the variable x. e (2.7...) and pi (3.14...) are already set. Numbers must be in a usual format (1; 1.1; .1; 3e5; 5d-7...). Macros are used as _NAME. All characters must be lower case !!

Use brackets to make sure, Plotter calculates the function, you want. It uses the normal mathematical rules (↑ before *,/ before + , -).