$e^y=2e^{x^2}$
$\left(4a^2b^{10}\right)\left(2a^{-3}b^{-4}\right)$
$\sqrt{81a^2}$
$-7\:.\:1\:+\:4$
$\frac{x^3-2x+x+2}{x-2}$
$log2\left(\:5\left(0\right)\:-\:7\right)\:$
$\frac{2\sqrt{x}+1\sqrt{2y}}{2\sqrt{x}+3\sqrt{2y}}$
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