$a^2-13+40$
$\lim_{x\to\infty}\left(-\frac{2x^2+4x+4}{e^x}\right)$
$m^2+3m+2$
$\frac{2x^3y^3}{4y^2}$
$\frac{18xy^6}{-6y^5}$
$7x^2+x-10-2x\cdot1$
$\:-5\:+\:-5\:+\:-5\:+\:-5\:+\:-2\:+\:-2\:+\:-1\:$
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