$\left(3^2+3\right):\left(-3\right)$
$a=-a$
$\frac{4x}{x-5}+\sin\left(88\right)\frac{2}{5-x}$
$\left(4^2\right)^2$
$\left(5x+10^2\right)$
$\frac{7}{9^{-2}}$
$-8-7\left(3-7\right)$
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