$3n^2+2\left(3n\right)\left(2m\right)+2m^2$
$\left(4x^3+5y^2\right)^2$
$3x^2+2x-5=22$
$15a^2-30ba$
$2\left(y^4-3\right)$
$3\left(5x^2+2x-3\right)-1$
$\lim_{x\to\infty\:}\left(\frac{e^{\frac{x}{2}}}{x^2+2x+3}\right)$
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