$-6+11x^4+3x-2x^5\left(6+3x-4x^3\right)$
$4-9n^2$
$\lim_{x\to z}\left(\frac{\sqrt[3]{x}-\sqrt[3]{z}}{x-z}\right)$
$\left(e^{\left(x\right)}+1\right)^2$
$3a^2+10ab\:+1b^2$
$4x^2-16x+12=0$
$\frac{x^{-2}}{z^{-2}}$
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