$\int\left(7x+7\right)^{2.5}dx$
$\left(3x^3-2\right)\left(-2x^4+5\right)$
$\frac{x_{-3}}{2}-\frac{x-2}{8}\le\frac{x}{2}$
$-120-\left(-32+\left(-14-18-7\right)\right)$
$\left(xy\right)+\left(2+4\right)xy\left(2\right)\left(4\right)$
$x^2-9x-20=0$
$2-\left(7x-11\right)$
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