U Calculator

A simple calculator, the display of which indicates expressions and gives easy operation for editing.
The calculator PanecalST includes features below:
*Four arithmetic operations, root, percentages, and tax calculations
*Calculations with parentheses
*Memory, M+, M-, MR, MC
*Trignometric functions
*Logarithms
*Scroll up/down lines
*Easy editing by using a cursor operation
*Cut, copy, and paste.
*Expressions history and answer history
*Configurable grouping separator and decimal point