$5m^2-5m+15$
$\frac{1-\cot\left(x\right)}{\tan\left(x\right)-1}$
$\frac{m}{2}=87$
$\frac{3x+3}{x+2}\le2$
$\int x\:e^{-2x^2}dx$
$\sqrt{242-49}$
$3\left(-1\right)^2$
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