Calc for func v3.4

Calc for func v3.4 is a free, easier to learn and use scientific calculator.
Calc for func includes the following features:
- unlimited number of variables (x,x0,x1,x2..,y,y0,y1...,z,z0,z1...);
- contains a math handbook (see help);
- save/open your functions to SD-card;
- Physical constants table (long click on "blue" screen);
- Trigonometric functions in radians only;
- Graphs maker;
- Simple mode;
- Linear systems;