[tex]3 {}^{8} \times 3 {}^{9} = 3 {}^{17} [/tex]
[tex]9 {}^{4} \times 9 \times 9 {}^{3 } = 9 {}^{8} [/tex]
[tex]12 {}^{7} \times 12 \div 12 {}^{6} = 12 {}^{8} \div 12 {}^{6} = 12 {}^{2} [/tex]
[tex] \frac{2 {}^{10} \div (2 {}^{6} \times 2)}{2 {}^{2} } = \frac{2 {}^{10} \div 2 {}^{7} }{2 {}^{2} } = \frac{2 {}^{3} }{2 {}^{2} } = 2[/tex]
