$2x^2-30x+180$
$\frac{dx}{dy}=\frac{1+y}{1+x}$
$\frac{4x}{2x^1}$
$3x+2x+37-7y$
$-145\:+\:830$
$\left(x-3\right)+2$
$\left(7ax+1\right)\left(7ax-6\right)$
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