$-2\left(3b-36\right)=3b$
$\frac{x^2+2x\:-3}{x^2+1}$
$p^29^{-\frac{1}{2}}$
$\left(7p-x^4\right)^2$
$sex\left(1\right)$
$z=5x+2y$
$10c+9=119$
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