$\int\frac{2x^2-4x+5}{\left(3x+1\right)\left(3x-1\right)\left(2x+1\right)}dx$
$x^2+12x-11$
$2x+1\cdot x^2+4x-2$
$\int\frac{4}{x^{2\:}}dx$
$\ln\left(\sqrt{x+2}\right)=8$
$\frac{x^2+2x-4}{x^2}$
$100b^4-169$
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