[tex] \sqrt{81} - 8 \times (3 - {4}^{2} ) + (12 \div 12) = \\ 9 - 8 \times (3 - 16) + (12 \div 12) = \\ 9 - 8 \times ( - 13) + 1 = \\ 9 - ( - 104) + 1 = \\ 9 + 104 + 1 = \\ 114[/tex]
