Ответ:
1) c 7-3-4 = c⁰ = 1
2) c⁰ + c-¹² - c³ = c-¹⁵
3) c¹⁸ + c-¹⁸ = c⁰ = 1
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Ответ:
1) c 7-3-4 = c⁰ = 1
2) c⁰ + c-¹² - c³ = c-¹⁵
3) c¹⁸ + c-¹⁸ = c⁰ = 1