$\frac{d}{dx}2\cos-2$
$\tan^24x=3$
$-x^2y^2+\left(-5xy^3\right)+\left(-4y^4\right)+7xy^3-8+x^2y^2$
$\lim_{h\to0}\:\sqrt{3-5\left(x+h\right)}-\left(\sqrt{3-5x}\right)$
$\csc^2\left(2x\right)+\left(\cot\left(2x\right)\right)\csc\left(2x\right)$
$\left(2n+4y^2\right)^3$
$3x-6=x-14$
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