$6+\left(-9\right)\left(-5\right)+\left(-4\right)\left(-3\right)+\left(-2\right)$
$7x+x^2+10+-7+x+10-2x$
$\int_0^{\infty}\left(v^3e^{\frac{-mv^2}{2rt}}\right)dv$
$e-1.4$
$6\cdot\frac{2}{3}\:+\:2\:\cdot\:\frac{1}{2}$
$5x^2+3x-8+\left(3x^2+5x-10\right)$
$\lim_{x\to2}\left(\frac{x^2\:+2x}{4x-8}\right)$
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