\( 10 \frac{16}{26} = \frac{10 \cdot 26 + 16}{26} = \frac{260 + 16}{26} = \frac{276}{26} \)
\( 6 \frac{10}{27} = \frac{6 \cdot 27 + 10}{27} = \frac{162 + 10}{27} = \frac{172}{27} \)
\( 9 \frac{5}{27} = \frac{9 \cdot 27 + 5}{27} = \frac{243 + 5}{27} = \frac{248}{27} \)
\( \frac{276}{26} - \frac{172}{27} + \frac{248}{27} \)
\( \frac{172}{27} + \frac{248}{27} = \frac{172 + 248}{27} = \frac{420}{27} \)
\( \frac{276}{26} - \frac{420}{27} \)
\( \frac{276 \cdot 27}{26 \cdot 27} - \frac{420 \cdot 26}{27 \cdot 26} = \frac{7452}{702} - \frac{10920}{702} \)
\( \frac{7452 - 10920}{702} = \frac{-3468}{702} \)
\( \frac{-3468}{702} = \frac{-1734}{351} \)
\( \frac{-1734}{351} = \frac{-578}{117} \)
\( -\frac{578}{117} = -4 \frac{110}{117} \)
Ответ: \( -4 \frac{110}{117} \).