$\frac{\left(1+x\right)^2}{\left(1-x\right)^3}$
$\int x^3\cdot\cos\left(9x\right)dx$
$7\left(-2x\:-\:3\right)$
$\lim_{x\to4}\left(\frac{x^4-1}{x^2-1}\right)$
$\left(e^2\right)\left(2\right)^2$
$sin^2x-sin^2y$
$82x-3\left(2x+3\right)+\left(4x-5\right)^2-5\left(2x-4\right)$
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