$x^2+4x=77$
$12x^2-84x+147$
$\int\frac{\left(3x^2-2x+5\right)}{\left(x+3\right)^3}dx$
$\int_a^{4x}dx$
$\int\left(x^2+1\right)\cdot\:\sqrt{2x+1}dx$
$\frac{120}{-4}$
$\left(4+g^4\right)\left(4-g^4\right)$
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