$x^2+8x\ge-7$
$\frac{-2x^2+5x^2-6x+3}{x-1}$
$\left(-xy\right)\left(4yw\right)$
$\frac { x ^ { 9 } } { x ^ { 4 } }$
$\int\left(\frac{9x^2}{\sqrt{x^2-4}}\right)dx$
$4x^2-36+9$
$5b\left(1+2a\right)+4\left(2a+1\right)$
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