$2\cdot x+40=52$
$\sqrt{\frac{3\left(98\right)}{2}}$
$\int\:-e^{-x}\:dx$
$\frac{d^2y}{dx^2}=\sin\left(3x+\frac{\pi}{2}\right)$
$5a^2-ab-5ab-5b^2$
$x^2-8x-3=0$
$\frac{dy}{dx}\left(y=\frac{2x^4}{b^2-x^2}\right)$
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