$\frac{d}{dx}x^2+y^2+2xy+y=45$
$\frac { 30 x ^ { 3 } y ^ { 3 } } { 5 x y ^ { 2 } }$
$\sqrt{2\cdot8}$
$\left(2x\:+\:5\right)\left(x^{2\:}+\:5x\:+\:1\right)$
$\int\:-e^{-x}\:dx$
$\lim_{x\to0}\left(\frac{\sqrt{25+h}-5}{h}\right)$
$7^5\cdot7^8\cdot7$
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