$\frac{\left(4t\right)^4}{5t}$

$\ln\left(6\right)+\ln\left(x^2\right)=\ln\left(2-x\right)$

$\int_{\frac{\pi}{2}}^{2\pi}\left(3x\right)dx$

$x^6\cdot x^2$

$\frac{1}{1+\sin\left(x\right)}+\frac{1}{-\sin\left(x\right)}=2\sec^2\left(x\right)$

$818\:+\:1021$

$x^2+4x-20\ge0$