$10\left(8y+4\right)^{2}$
$\cos\left(\frac{5\pi}{7}\right)\:\cos\left(\frac{3\pi}{5}\right)-\sin\left(\frac{5\pi}{7}\right)\sin\left(\frac{3\pi}{5}\right)$
$\lim_{x\to2}\:\frac{y^2-4}{y^3-8}$
$\frac{dy}{dx}=7xe^{-y}$
$x-7<-9x+13$
$\frac{3x^4-5x^2+x-3}{x^2+1}$
$-5=3+u$
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