Very simple, but powerful calculator, with calculation history.
History can by copy to clipboard, share or print. Colors can be changed.
Calculator can be also used by keys:
Tab - change sign,
V - paste,
C - copy
Z - read/clear Memory, A - add to Memory, X - substract from memory
- - Substract;
+ - Add;
*,M - Multiply,
/,D - Divide
P - Percent,
I - 1/x,
Q - Sqrt
