$\lim_{x\to5}\left(\frac{x^3-8x^2+3x+90}{x-5}\right)$
$\frac{1}{n}\left(x-1\right)^n$
$\lim_{x\to0}\left(\frac{1-\cos\left(6x\right)}{3x^2}\right)$
$3cot^2x+2=3$
$2x^2+7y-7=0$
$\left(z-1\right)e^{iz}$
$-\:6x\:+\:4x\:-\:22x\:+\:28x\:-\:55x\:+\:36x$
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