Bonjour,
[tex]( {7}^{3} ) {}^{6} = 7 {}^{3 \times 6} = 7 {}^{18} [/tex]
[tex]6 {}^{5} \times (6 {}^{3} ) {}^{2} \div 6 {}^{15} = 6 {}^{5 + 6 - 15} = 6 {}^{ - 4} [/tex]
[tex]3 {}^{2} \times 5 {}^{2} \div 15 {}^{3} = 3 {}^{2} \times 5 {}^{2} \div (3 \times 5) {}^{3} = (3 \times 5) {}^{ - 1} = 15 {}^{ - 1} [/tex]
