$\lim_{x\to9}\left(\frac{x^2-81}{\sqrt{x-3}}\right)$
$\left(\frac{2}{3}xy^5+\frac{5}{2}x^3y\right)^2$
$q^2-24q+80$
$\frac { \sqrt { 0 } } { 2 }$
$5-\left(-12\right)-8+6\left(+5\right)+10-5-\left(-9\right)+3$
$-\left(-3x^2+4x-2\right)$
$1n^2+10n+25$
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