$\sqrt{\left(1-x\right)-2}$
$12n+5+3n-5$
$8\left(x^2\:+\:4\right)$
$\int\frac{1}{\left(2x+5\right)^2+9}dx$
$3x^2+6x-9=0$
$\lim_{x\to\infty}4x^2-3x$
$\frac{2x^3-5x^2+6x-3}{x+2}$
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