$\frac{d^2}{dx^2}\left(x^3-3x^2y+2xy^2=12\right)$
$-2x\left(1-9x\right)+9\left(-2-x\right)$
$3x+4=-20$
$5p-3+5q+8p+7-4q$
$\int\frac{x^2+x+3}{x\left(-2\right)}dx$
$\frac{81x^2-16}{9+4}$
$8m\ge56$
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