$\int\frac{\sqrt{4x^2+9}}{x^3}dx$
$( - 901 ) + ( 1 )$
$2\cos\left(b\right)-1=\cos\left(b\right)$
$\lim_{x\to2}\left(\frac{x}{2\left(x-2\right)}\right)$
$\frac{x^4}{a^6-x^6}$
$\left(6m^5+3-m^3-4m\right)-\left(-m^5+2m^3-4m+6\right)$
$\left(\frac{2}{3}x+\frac{3}{2}y\right)^2$
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