Breuken aftrekken (reeks 2)

Trek de breuken af

\(\frac{-13}{7}-\frac{7}{13}\)

\(\frac{-13}{7}-\frac{7}{13}\\=\frac{-169}{91}-\frac{49}{91}\\=\frac{-169-49}{91}\\=\frac{-218}{91}\)