Ответ:
7²+ 250= 7×7 + 250= 49+250 = 299
420-2³ = 420 - 2 × 2 ×2 = 420- 6 = 414
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Ответ:
7²+ 250= 7×7 + 250= 49+250 = 299
420-2³ = 420 - 2 × 2 ×2 = 420- 6 = 414