$3x^2+x+6$
$\lim_{x\to0}\left(\frac{e^x-1-x\cos\left(x\right)}{\sin\left(x\right)^4}\right)$
$\int\frac{x}{\left(-6\right)}dx$
$-7x^2-6+2x+13x^2-15x$
$-12\ge-5x-9$
$z^2+17z=-22$
$\frac{x^4-x^3\:+x^2\:-x+2\:\:}{x-2}$
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