Report - a ± b ± c ± d ±… a ∙ b + c a + b ∙ c a ∙/: b ± c a ± b ∙/: c · a 1 + 7 + 10 + 6 − 7 − 12 − 4 = 1 9 ∙ 11 + 11 = 110 198 70 − 7 ∙ 2 = 56 126 b 24 − 18

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