\[9a - \left( a - (3a - 1) \right) = 9a - (a - 3a + 1) =\]
\[= 9a + 2a - 1 = 11a - 1\ \]
\[при\ a = - 1,01:\]
\[11 \cdot ( - 1,01) - 1 = - 11,11 - 1 = - 12,11.\]