$\int_{-\pi2}^{\pi2}\cos\left(x\right)x^2dx$
$\left(a^{2x}+a^{x+1}\right)^2$
$\sin\left(0\right)\frac{4}{7}$
$\:\left(x+4\right)\left(x-2\right)$
$6\left(3k+4\right)$
$\frac{d}{dx}\frac{1}{x^{-18}}$
$1^3\cdot2^5$
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