Scientific Calculator in Java | Not a Tutorial

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Advance scientific calculator developed by me with the help of my two other friends in our 2nd semester at Comsats Wah university.

Features:
1) Save 10 calculations (history).
2) Save any number in its memory.
3) 12 scientific constants.
4) Various unit converters.
5) Dual screen for easier calculations.
6) Easy to use.

You guys can copy this code if you want to (if u understand this, hopefully. Because its not a tutorial).

Note: This calculator can perform different operations on maximum two operands. For example; A+B=C , but it will give wrong answer if user gives this input : A+B+C= wrong answer. In order to do the later calculation, use this method : A+B=C , +D=E.

There are few other minor bugs, that can be ignored.

Track List:
The Last - One
Tetrix Bass Feat
Zerryx & Midranger - Crystal [FSTU Release]
Twin Musicom - Dance, Don't Delay
Alicks. - Next To You
Daniel Rosty - Aurora

PEACE