$\left(3x+2\right)\left(4x-2\right)$
$\int_{-3}^1\left(-16x\right)dx$
$cos\left(x\right)\frac{\sqrt{3}}{2}$
$\left(a^2+7a\right)^2$
$x^3-18x^2+81x$
$\frac{1+\cot\left(x\right)}{1+\tan\left(x\right)}=\frac{1}{\tan\left(x\right)}$
$\int\frac{5}{cos^2x}dx$
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