Corect: 9-7=2, 90-13=77, 100-26=74, 300-56=244, 98-89=9, 65-65=0, 42-30=12, 50-32=18, 200-70=130, 95-13=82, Incorect: 8-5=2, 13-7=7, 100-25=85, 200-40=60, 67-76=1, 50-38=22, 54-45=10, 89-78=9,

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