$\frac{\left(\tan^{2}\alpha-1\right)\cdot\cos\alpha}{\tan\alpha-1}$
$\int x^2\cdot e^2\cdot\cos\left(x\right)dx$
$6x^2+10x+12x^3$
$18s+16s-14+13$
$16x^4y^4\left(2x\right)$
$\left(x+2\right)\left(3x^2-4x+5\right)$
$\frac{4}{5}b\frac{4}{5}c\frac{4}{5}f$
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