$\left(x^2-\frac{1}{x^2}\right)^4$

$-\frac{360}{-60}$

$\int6x^3\:\left(3x^4+65\right)^5\:dx$

$\frac{cos\left(x\right)}{cos\left(x\right)+1}=\frac{1}{1+sec\left(x\right)}$

$\int\sqrt{x}\left(x+x^{-1}\right)dx$

$\int\left(2x^{2}-4x\right)^{6}\left(x-1\right)dx$

$\lim_{x\to\infty}\left(\frac{\left(2^x+3^x\right)}{10^{\frac{x}{2}}}\right)$