$\frac{cos\left(-x\right)cot\left(-x\right)}{sin\left(-x\right)}$
$5x+3+2x-y$
$\frac{d}{dx}1-xy=x-y$
$\left(-3x+y\right)\left(-2x-y\right)$
$\int8cos^2\left(\frac{1}{2}x\right)dx$
$\frac{1}{\left(d+1\right)\left(d^2+1\right)}$
$145.02-44.07$
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