$\lim_{x\to i}\left(\frac{1+x^2}{1+x^{18}}\right)$

$\int e^{\frac{2x}{5}}dx$

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

$\frac{-58-\left(2-2\right)}{-2-2\left(0\right)}$

$\frac{dv}{dt}=\frac{3v\sqrt{1+t^2}}{t}$

$\int10sin^4\left(2x\right)cos^3\left(2x\right)dx$

$11+2x+x+4$