801.4-(74-525.35:7.9)*(64.4-6.88:8.6)
801.4-(74-525.35:7.9)*(64.4-6.88:8.6)=324.4 1)525.35:7.9=66.5 2)74-66.5=7.5 3)6.88:8.6=0.8 4)64.4-0.8=63.6 5)63.6*7.5=477 6)801.4-477=324.4