$4x^2-70x+49$
$-5x^3y^2\:-1\:-6\:+x^3y^2\:-1y$
$-3+\left(-4-2\right)+\left|-7-\left(4-7\right)+3\right|$
$\left(a+3b\right).\left(a+x\right)$
$180x>=x^2+197x-200$
$\left(a+2\right)\left(2a+3\right)\left(a-1\right)$
$4x-8y+7+\frac{dy}{dx}=0$
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