[tex] {2}^{7} \div {2}^{6} + {3}^{9} \times 3 {}^{15} \div 3 {}^{20} + (3 {}^{1} \times {2}^{4} - {4}^{2} ) \div {2}^{3} = \\ {2}^{1} + {3}^{24} \div {3}^{20} + ( 3 \times 16 - 16) \div 8 = \\ 2 + {3}^{4} + (48 - 16) \div 8 = \\ 2 + 81 + 32 \div 8 = \\ 2 + 81 + 4 = \\ 87[/tex]
