$3-x^2+2abx^2-6ab$
$-\left(a+5\right)^2$
$\frac{d^2y}{dx^2}\:y=x^4e^{2x}-cosx$
$\int x^2e^{-7x}dx$
$\frac{1}{5}\:x\:\frac{3}{20}$
$-5\cdot\frac{-2}{5}$
$\int\frac{\left(2x^2+3\right)}{\left(x^2+2\right)\left(x-2\right)}dx$
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