$9x^3y^2zw\:para\:x=0,z=2,w=2$

$x^2-\:x+1\ge0$

$\lim_{z\to\infty}\left(\ln z\right)^{\frac{1}{z}}$

$\left(2a^3b^{10}\right)^9$

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

$64\left(2+y\right)^2-121\left(z-2\right)^2$

$\left(\frac{39}{0}\right)$