$\left(2-\sqrt{-4}\right)-\left(6+5i\right)$
$20\sin\left(a\right)^2+44\sin\left(a\right)-15$
$16x^3-54y^3$
$\frac{dy}{dx}+4y-e^{-x}=0$
$\int\:\frac{x^4-2x^2\:+\:2}{\left(x^2-2x+2\right)^2}dx$
$-\frac{30}{2}$
$\int4x^3\left(x^4+2\right)^3dx$
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