Tính: [(-4).(-9) - 6].[(-12) - (-7)]

\(\left[ {\left( { - 4} \right).\left( { - 9} \right) - 6} \right].\left[ {\left( { - 12} \right) - \left( { - 7} \right)} \right]\)\( = \left( {36 - 6} \right).\left( { - 12 + 7} \right)\)\( = 30.\left( { - 5} \right) = - 150\)