$\int\frac{2x^4-3x^3+5x^2+x+3}{x^3+x}dx$
$x-19=-14$
$x^3\:y^{3\:}-\:216$
$\frac{\cos\:\left(x\right)+\sin\:\left(x\right)+1}{\cos\:\left(x\right)+\sin\:\left(x\right)}$
$\frac{dz}{dx}\:x^2-2yz^2$
$7=5+4\cos x$
$\lim_{x\to-2}\left(\frac{3x^2+4x-4}{x+2}\right)$
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