$\frac{x^3-4x^2+4x+16}{x-4}$
$tan^2\left(x\right)-\tan\left(x\right)$
$\frac{\left(\frac{x}{y}+1\right)\left(\frac{x}{y}-1\right)}{\frac{x}{y}-\frac{y}{x}}$
$1x^2+1x+100$
$x+y-3z=7$
$6x^5-12x^4+2x^3$
$0-\left(-34\right)$
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