$\frac{x}{x-2\:}=74.77778$
$\frac{a^2-49b^2}{a-7b}$
$\int\frac{b^3+14b^2+2}{4b^4+b^3-7b^2+2b}dx$
$3x\cdot16$
$2x-y=5$
$8x-4y=52$
$\frac{1+\cos\left(x\right)^2}{\sin\left(x\right)^2}+1=2\csc\left(x\right)^2$
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