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18
Prove that the sum of pythagorean triples is always even
math.stackexchange.com
11
Integration with Exponentials
math.stackexchange.com
11
Showing that $f(x)=\frac x{x+1}$ is the unique function satisfying $f(x)+f\left(\frac1x\right)=1$ and $f(2x)=2f\big(f(x)\big)$
math.stackexchange.com
6
What is the value of $i^{i^{i^\ldots}}$?
math.stackexchange.com
5
Solving $p^x = x^q$
math.stackexchange.com
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