$\:64^2-60^2$
$-2r\:=\:16$
$\frac{-2}{\sqrt{3}}x$
$6+3\left(x+7\right)\left(x-7\right)$
$5a+4+3a+1$
$\int\left(4-2x\right)^9dx$
$\left(-497\cdot12\right)$
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