$y=\left(5x-3\right)\left(4-\frac{3}{x}\right)$

$x^2+4z^2-6x-y+10=0$

$18\cdot4+18-\left(-2\right)+11$

$\frac{5}{6}\left(3-x\right)\frac{1}{2}\left(x-4\right)\ge\:\frac{1}{3}\left(2x-3\right)-x$

$\int_7^{\infty}\left(\frac{1}{\sqrt{x-3}}\right)dx$

$\lim_{x\to\infty}\left(\frac{x\ln\left(x\right)}{x+\ln\left(x\right)}\right)$

$x^3\left(x+y\right)+5xy\left(x+y\right)$