$\int\left(2cosh\left(u\right)\right)dx$

$\int-3tan^2\left(x\right)sec^2\left(x\right)dx$

$\left(x+2\right)\left(x+3\right)m$

$\int_{-\infty}^0\left(\frac{-6x}{\left(x^2+1\right)^2}\right)dx$

$\lim_{x\to5}\left(\frac{13x^2-13x-10}{2x^2-7x-15}\right)$

$\lim_{x\to0}\left(\frac{e^{-2x}-sin\left(2x\right)-1}{x\cdot sin\left(5x\right)+8x^2}\right)$

$\int\frac{e^{-\sqrt[2]{x}}}{\sqrt[2]{x}}dx$