$121x^2-64y^2$
$\left(-10\right)\left(8\right)\left(-8\right)$
$r^2+26r$
$y=\sqrt[9]{\frac{x-9}{x+2}}$
$\left(xa+3b^2\right)^2$
$5.42\cdot8.31$
$\int x^4\sqrt{x+20}dx$
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