Squaring a number means to multiply it by itself, in this case, 20 squared (written 202) = 20 x 20.
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502 + (20/(202) x 15) = 2500.75
It is 5x2 - 20
if you mean PI squared + PI squared / by 2 then that is.... 4.9298 solved on paper ... BUT if you mean what you said, the answer is YUMMY!
If you mean ex squared, the answer is e2x
20x20