$\frac{2x^4-7x^3+9}{x^2+3}$
$-6+\left(-1\right)^4$
$\sinh\left(2\ln\left(3x\right)\right)$
$\frac{3x^4-2x^2-2}{2x+2}$
$6x-x+20x-8x$
$y'=\frac{cot\left(y\right)}{x}$
$\frac{d^7}{dx^7}\left(sin^2\left(x\right)\right)$
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