$10x^2+30x-70$
$17-\left(-29\right)$
$\frac{x+1}{5}=\frac{x+3}{3}$
$c^2+2cd+d^2$
$\frac{dy}{dx}=sen\left(x+y-1\right)$
$6a+6a-a$
$\sqrt[2]{10^8}$
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