Question 82
Prove that for positive $a$, $b$, $c$ and $l \gt m$
$$
\frac{a^{3l} + a^{3m} + 1}{a^l + b^{l-m}a^m + b^l} + \frac{b^{3l} + b^{3m} + 1}{b^l + c^{l-m}b^m + c^l} + \frac{c^{3l} + c^{3m} + 1}{c^l + a^{l-m}c^m + a^l} \ge a^m + b^m + c^m.
$$
$$
\frac{a^{3l} + a^{3m} + 1}{a^l + b^{l-m}a^m + b^l} + \frac{b^{3l} + b^{3m} + 1}{b^l + c^{l-m}b^m + c^l} + \frac{c^{3l} + c^{3m} + 1}{c^l + a^{l-m}c^m + a^l} \ge a^m + b^m + c^m.
$$