$28a^5+14a^4-7a^3$
$aycaca$
$cos^2x-sen^2x=-1+4senx$
$\lim_{x\to0}\left(\frac{sin3x}{sin8s}\right)$
$\left(11x^3+5y^3+4\right)^2$
$-499-275-334$
$\int x\:ln\left(x\right)^3dx$
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