$9y-4y+2y$
$6\left(1\:-\:2x\right)\:+\:3\left(4x\:-\:2\right)$
$\frac{dy}{dx}=\frac{xe^x\ln\left(x\right)+e^x}{x\cos\left(y\right)}$
$18\cdot22$
$500\cdot10$
$\tan\left(\frac{x}{2}\right)+\cot\left(\:\frac{x}{2}\right)=2\csc\left(x\right)$
$8x^4-24x^2+18$
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