$\left(6p^26p\right)\left(p^2+pr+ps+rs\right)$
$9w^22y+12w^62$
$\left(81x^2-4y^2\right)$
$7x^2\:-\:7x\:-\:13\:=\:0$
$\left[\left(-3\right)^4\right]^3$
$\frac{x^5}{a+b}-\frac{x^2}{a-b}$
$6v-5\left(12v^3+38v^2-16v-20\right)$
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