$z^2-64w^2$
$\left(a^{8}-b^{14}\right)\left(a^{8}+b^{14}\right)$
$5\:x\:-4\:x\:-1$
$\int5\left(\arctan\left(\frac{x}{2}\right)\right)dx$
$\frac{d}{dx}\left(x^4-1\right)^{lnx}$
$f'\left(x\right)=x+\left(\frac{1}{2}\right)sen\left(2x\right)$
$\lim_{x\to0}\left(\frac{1-sinx+cosx}{sinx+cosx-1}\right)$
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