$8r-9-2r-1$
$\frac{x+2}{3}+\frac{4x+1}{2}$
$g^2+14g+40$
$\left(2c-2\right)^2$
$125x-0.1x^2$
$\left(b^3\cdot b^5\right)$
$t^2-12t+32$
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