$\int\frac{x^2-2x-3}{\left(x+1\right)\left(x^2+2x+2\right)}dx$
$-2x+3x+5x+7x$
$\frac{dy}{dx}=x^3-x$
$\frac{64a^3-343}{4a-7}$
$5x-3\cdot5x+3-2\cdot3-5x^2$
$\left(z^5+w^7\right)\left(z^5-w^7\right)$
$\int\frac{x^2}{\sqrt{121+x^2}}dx$
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