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-7·8 - (- 6)·(- 4)+64 ÷ (- 8) = -56-24-8 = -88
(- 5·7+22)·(14-23) =(-35+22)*(-9) = (-13)*(-9) = 117
(4·11 - 72 ÷ 9 + 66÷6) · (- 32 ÷ 8+ 4·9 - 21) = (44-8+11)*(-4+36-21) = 47 * 11 = 517