$\left(3x+\frac{1}{4}\right)^3$
$\left(8-4x\right)\left(2x+6\right)$
$b^2+b^2+b^2+b^2+b^2$
$\int\:\left(2x^3+3x\right)e^{-x}dx$
$\lim_{x\to\frac{\pi}{4}}\left(\frac{1-cot\:gx}{1-tanx}\right)$
$\frac{dx}{x}+\frac{dy}{y}=0$
$\left(9x-8\right)\left(9x+8\right)=81x^2+64$
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