$\frac{d}{dz}\frac{xy^2}{z^3}$
$5\sin x\left(\csc x-\sin\left(x\right)\right)$
$3x-15=9$
$7.06\cdot0.5$
$7x^2-9x+2=0$
$x^2+3x+14<0$
$\int-\frac{2x^2+10x+12}{x^3-4x}dx$
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