$2\left(x+1\right)+3x+5$
$12x^2-132x+216$
$\lim_{x\to\infty}\left(\left(\left(1+\frac{2}{x^2}\right)^{\frac{3}{x}}\right)\right)$
$\left(+10\right)\cdot\left(-6+4-12-3\right)$
$x^2-4x=18$
$x+45x$
$9ab^2+8y+5z+2z-6ab^2+3y$
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