$2x+20=-30$
$\int_a^{\infty}\left(e^{-nx}\right)dx$
$8-6x+4x^2-5$
$3x-4\ge16$
$\frac{dy}{dx}-\frac{2y}{x}=-x^2\sin\left(x\right)$
$\int-1x^3\sqrt{9-x^2}dx$
$2vu^4\cdot3u^4v^4\cdot2u^2$
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