[tex]81 {}^{4} \div 27 {}^{4} = 3 {}^{16} \div 3 {}^{12} = 3 {}^{4} = 81[/tex]
[tex](2 \frac{1}{3} ) {}^{10} \times ( \frac{3}{7} ) {}^{10} = (2 \frac{1}{3} \times \frac{3}{7}) {}^{10} = ( \frac{7}{3} \times \frac{3}{7} ) {}^{10} = 1 {}^{10} = 1[/tex]
[tex]( - 0.8) {}^{4} \div 8 {}^{4} = 0.8 {}^{4} \div 8 {}^{4} = (0.8 \div 8) {}^{4} = 0.1 {}^{4} = ( \frac{1}{10} ) {}^{4} = \frac{1}{10000} [/tex]
[tex]( - \frac{5}{12} ) {}^{3} \div (\frac{1}{12} ) {}^{3} = - ( \frac{5}{12} ) {}^{3} \div ( \frac{1}{12} ) {}^{3} = - ( \frac{5}{12} \div \frac{1}{12} ) {}^{3} = - ( \frac{5}{12} \times 12) {}^{3} = - 5 {}^{3} = - 125[/tex]
