$\frac{4+\cot x}{4\csc x+\sec x}$
$\lim_{x\to infinity}\left(\frac{e^{-x^3}}{x^2}\right)$
$6y^3\:-\:15y^2$
$+2\:+17$
$4.7y-2.3y$
$\frac{d^2y}{dx^2}=\frac{1}{x}+y$
$\left(0.5a^4b^2\right)\left(0.4a^3b^2c\right)$
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