$8 x ^ { 3 } + 4 x ^ { 2 } + 2 x - 4$
$\left(x.y\right)\:\left(-xy\right)\:$
$-2\left(d-5\right)$
$\frac{d^2}{dx^2}8xe^{\left(x+1\right)}$
$5\sin^2\left(x\right)-8\sin\left(x\right)=3$
$5x^2-3x+11$
$\lim_{x\to1}\left(\frac{x^3+1}{x-1}\right)$
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