$2x\left(x+y-z\right)-x-y-z$
$\int_0^4\left(x^3\sqrt{9+x^2}\right)dx$
$\left(x^2-\:5\right)\left(x^2\:+\:9\right)$
$\frac{27a^3b^2}{3ab^2}$
$x^2-5x-33$
$\frac{3x^2+27x+47}{x+7}$
$n^2-14+49$
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