$2\sqrt{48}$
$\cos\left(x-\pi\right)=\cos\left(x\right)$
$\frac{d^2}{dx^2}\left(\frac{1}{3-2x}\right)$
$\frac{u^4-u^2+9}{u\left(u^2+3u+3\right)^2}$
$c+8=-20$
$30-2^2-1^3\cdot3$
$\int_0^{\frac{x}{2}}\left(sen\:x\right)dx$
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