$\left[10-\left(21-14\right)\right]-\left[5+\left(17-11+6\right)\right]$
$16m^2-25m^2+9n^4$
$\int\frac{e^{4x}}{e^{2x}+1}dx$
$tan\left(x\right)cot\left(x\right)^5$
$333-14$
$\left(\frac{-3}{2}\right)\left(-2\right)$
$\left(8m+7a\right)\left(-4m^2+3a\right)$
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