N
nkoccatinh


5/x + 1/(x+1) = 3/(x+2) + 2/(x+3)
\oint_{}^{}\geq\Rightarrow\Leftrightarrow\int_{}^{}\forall\bigcup_{}^{}\sum_{i=1}^k a_i^n\{ABC}
\oint_{}^{}\geq\Rightarrow\Leftrightarrow\int_{}^{}\forall\bigcup_{}^{}\sum_{i=1}^k a_i^n\{ABC}