$\int\left(\frac{3.2^x.3^x.2}{2^x}\right)dx$
$y^2+18y+81$
$9x^2y+3x^2y+7x^2y+13x^2y$
$2x^{-2}-7x^{-1}-15=0$
$-3\frac{1}{2}\:x\:-2\frac{3}{4}$
$\left(2a^2-a+3\right)\left(3a^2-2a\right)$
$\int14sin^3xcos^2xdx$
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