$k=\cot\left(x\right)\cdot\sin\left(x\right)+\cos\left(x\right)^2\cdot\sec\left(x\right)$
$h\left(-4\right)=\left(-4\right)+\frac{1}{2}\left(-4\right)^4-\frac{3}{4}\left(-4\right)^3+10$
$56^2-49^2$
$\left(\frac{1}{4}a^2-ab+\frac{2}{3}b^2\right)\left(\frac{1}{4}a-\frac{3}{2}b\right)$
$\frac{4x\:-\:8y}{2x\:-\:4y}$
$\frac{dy}{dx}=\frac{1}{3}\left(8\right)^{-\frac{2}{3}}$
$5\cdot\left(8-2\cdot3\right)$
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