$\frac{d^2}{dx^2}\left(4x^3\cdot\cos\left(y-e^{-y}\right)\right)$
$4x^2-8x-16=y$
$\int\frac{1}{16}xe^xdx$
$\int x\left(ln\left(3+x\right)\right)dx$
$6x^2+24xy^2+16y^4$
$\frac{12x^2+3x\:}{-12x}$
$\lim_{x\to0}\left(\frac{1}{x\left(x+1\right)}\right)$
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