$\lim_{x\to0}\left(\frac{1-\cos\left(x\right)}{2\:-\:2e^{4x}}\right)$

$\int_0^{\pi}\left(\frac{1-cosx}{x^2}\right)dx$

$\lim_{x\to infinity}\left(2\left(-\frac{7}{9}\right)^x\right)$

$\frac{dy}{dx}+2y-2e^{-2x}=0$

$b^3-1$

$f\left(x\right)=7x^3-16x+18x-4$

$\left(-4\right)\:\left(-2\right)\:\left(10\right)\:\left(-1\right)$