$4\sec x-2=6secx$
$9m\:+12mn+4m^2$
$\int5x^3e^{2x}dx$
$\frac{\:3x^{14}y^{11}}{18x^2}$
$\lim_{x\to-1}\left(\frac{x^2}{x^4-1}\right)$
$1000\left(1+\left(0.035\cdot1\right)\right)$
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