$b\left(s\right)=2s^3+2\:$

$2x^3-36x^2+162x$

$\int\left(\frac{1}{\left(x+4\right)\sqrt{x^2+8x+8}}\right)dx$

$-6-\left(6+4\right)$

$\lim_{x\to0}\left(\frac{4x}{\sqrt{1-2x}-\sqrt{1+2x}}\right)$

$\cos^2\left(x\right)-\sin^2\left(x\right)=\cos2\left(x\right)$

$\lim_{x\to0}\left(2\frac{e^x}{x^2}\right)$