$\lim_{x\to0}\left(\frac{\sin^2\left(x\right)}{x\ln\left(1+x\right)}\right)$
$9m^2+3mn+36n^2$
$10x\:-20=30$
$\frac{4x^2+2x}{4x+2}$
$x^3-5x^2+2x-10$
$5w\left(4w^2-2w\right)+3w\left(-2w^2+4w\right)$
$x^2+4x+5$
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