$\frac{4x+8}{x}\ge2$

$27\left(-3\right)-\left(3\right)\cdot\left(-5\right)-\left(-6\right)\cdot\left(-2\right)$

$\left(7x^5y^4\right)\left(-3x^2y\right)$

$\int\sqrt{e^t-3}dt$

$3\log_{10}\left(6\right)-\frac{1}{3}\log_{10}\left(64\right)=\log_{10}\left(2x\right)$

$\frac{\sec\left(x\right)-1}{\tan\left(x\right)}=\frac{\tan\left(x\right)}{\sec\left(x\right)-1}$

$\lim_{x\to\infty}\left(\frac{1}{x-1}\right)$