$6m>72$
$7z^2+42=149z$
$-9r+10r$
$\frac{x^2-5x+6}{x^2-x-2}+\frac{x^2+x-20}{x^2-3x-4}$
$\int\frac{x^2+4}{\left(x^2+3\right)\left(x-4\right)}dx$
$f\left(t\right)=t^3-9t^2+24t$
$\left(0.80\right)\left(25\:+\:15\right)\:$
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