Вычислите:
[tex]1) {7}^{3} \times {7}^{ - 2} \\ 2)2 \div {2}^{ - 2} \\ 3)( {3}^{ - 1}) {}^{2} \\ 4)( {5}^{ - 2} ) ^{ - 1} \\ 5) {8}^{ - 2} \times {4}^{3} \\ 6) {10}^{0} \div {10}^{ - 3} \\ 7) {10}^{8} \times {10}^{ - 5} \times {10}^{ - 4} \\ 8) {3}^{ - 6} \times ( {3}^{ - 2} ) ^{ - 4} [/tex]
помогите, 20 баллов
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