$-5x^3+9x^2-7x+2\cdot11x^2$
$\frac{dy}{dx}=\frac{x^2-3}{y^2}$
$\left(7-4i\right)\left(7+4i\right)$
$\int\frac{1}{\left(1+y^2\right)^{\frac{1}{2}}}dy$
$16x=320$
$\frac{x^3-4x}{x^2-1}$
$-t^2+8t=12$
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