$\frac{1-\left(a+n\right)^2}{1-\left(a+n\right)}$
$\log_{10}\left(18\right)-\log_{10}\left(3x\right)=\log_{10}\left(2\right)$
$5x+28=-32$
$\int\frac{2x}{\left(x^2+1\right)^3}dx$
$2a^2+5a+28$
$3a+12=126$
$5.7^2$
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