$\frac{3x^3-2x^2+3x-8}{3x^2-1}$
$\int\left(x^2-5\right)\sqrt[4]{4x+7}dx$
$a^{12}.\:a$
$4x^2-4=0$
$\lim_{x\to0}\left(\frac{4x^2}{2-cosx}\right)$
$2sin^2x-cos^2x=2$
$\left(y+12^2\right)$
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