$cot\left(x\right)sin\left(2x\right)=\frac{2}{1+cot^2\left(x\right)}$
$4a^3bx+4bx$
$3x^3+6y^22x-5y^3$
$\int x\cdot\ln\left(\frac{x}{5}\right)dx$
$-\left(2am-3x\right)+\left(6am-3x+a\right)\:$
$\int x\:sec^{-1}\:x\:dx$
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