$8y^22^4+2y^22^4+5y^22^4$

$\lim_{x\to infinite}\left(\frac{1-\cos\left(x\right)}{x^2}\right)$

$\sin\left(x\right)=-0.8686$

$\frac{-2x^2+16x-24}{-6x^2+32x-40}$

$\frac{d^3}{dx^3}\left(x^2+\frac{x^6}{3}+\frac{1}{20}\right)$

$7a^2+2a+6\:para\:a\:=2$

$\sec\left(3x\right)=-2$