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Prove that in any triangle it holds that:
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it holds that:![\[16\sum m_a^2 m_b^2 = 9 \left ( s^2 + r^2 + 4Rr \right )^2 - 144 s^2 Rr\]](https://www.math.tolaso.com.gr/wp-content/ql-cache/quicklatex.com-b551d1d29160dd9f3c5d13cd46d18211_l3.png "Rendered by QuickLaTeX.com")
it holds that: