$\frac{4x^2+18x-36}{4x-6}$
$4x+3=x+2\left(x+7\right)$
$24+\infty$
$x + 3 = \sqrt { 3 x - 1 }$
$x^5-32\:=\:0$
$2x^4\cdot4x^4$
$c+9=9+c$
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