$\:\int_3^{4-x^2}\:\frac{x}{\sqrt{y}}dy$
$x-\frac{29x-56}{\left(3x-7\right)\left(2x-3\right)}$
$u^2-121$
$\int_{-\infty}^{-1}e^{-2x}dx$
$\left|-8\right|-\left(-3\right)$
$x\:+\:6\:=\:-7x\:-\:2$
$1^2-2$
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