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(7*9-x*5)-9/3=20
909/9-(9*9/x-9)=100
35*5-54/x*4=139
60-10/(37-4*x)=50
81+9/9*(x+7)=101
38+(38+x/3)-3*10=84
x/2+45-25/(36-99/9)=73
10*20*30*40*a*101=0