$9x^2y^5-36x^4y^3+90x^2y$
$\lim_{x\to\frac{\pi}{3}}\left(\frac{\cos\left(x\right)-.5}{x-\frac{\pi}{3}}\right)$
$x^8-y^4$
$\left(2x+3\right)^2-3\left(2x+3\right)-28$
$x^2-x+11$
$\int\left(2x^2-3x+1\right)e^{4x}\:dx$
$m^2n^2+xy+xn^2+ym^2$
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