$\frac{4n^3+n^2+3n}{n+1}$
$\:2\:m\:n\:-\:2\:m$
$x^2-2x+1=16$
$\frac{sin2x+cos2x+1}{sinx+cosx}=2cosx$
$2\left(2x+1\right)$
$abc^7\cdot abc^5$
$\int_x^0\left(\frac{x}{\left(x^2+a^2\right)^{\frac{3}{2}}}\right)dx$
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