$\int\left(x+5\right)^{-1}dx$
$2k^2-11k+9$
$f\left(x\right)=\sqrt{x^3-1}$
$\frac{\left(3a^3+2\right)^2-\left(3a^3-2\right)^2}{12a^2}$
$55x-11y-9+20x-1-y$
$f\left(x\right)=x^2-4x\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:$
$\sqrt{36}+\sqrt{121\:}+4^2$
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