$8x^2\:+2x+20$
$\frac{-2x^3+x^2-\frac{1}{2}x+3}{\frac{1}{2}x-x^2}$
$3\left(x+1\right)^2\left(x-1\right)+3$
$t'=-k\left(t-22\right)$
$\left(2x+3\right)-11$
$\left(3x+9\right)\left(3x+2\right)$
$\frac{5}{x+2}+\frac{x+2}{\left(x+2\right)}$
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