$\frac{\sqrt{6x+h}-\sqrt{6x}}{h}$
$-3a+4b-6a+81b-114b+319-a-b$
$\frac{dy}{\:dx}-\frac{y}{x}=xe^x$
$8^x-8^{x-1}=14$
$3x\left(x^5-3x+1\right)$
$\frac{x}{18}-\frac{1}{3}=21$
$\int2\cot^3\left(x\right)\csc^2\left(x\right)dx$
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