42-320÷80×4б (900-90)÷9-7×5б 168÷8×6÷(72÷24)б (89плюс51)÷7×9-53 (100÷25×60-42)÷2

Question

42-320÷80×4б (900-90)÷9-7×5б 168÷8×6÷(72÷24)б (89плюс51)÷7×9-53 (100÷25×60-42)÷2

Answer 1

42-320÷80×4б=42-16б
168÷8×6÷(72÷24)б=42б
(100÷25×60-42)÷2=-9
(900-90)÷9-7×56=-302
(89+51)÷7×9-53=127