(30-2)*5=30*5-2*5=150-10=140
7*(60-2)=7*60-7*2=420-14=406
85*137-75*137=137*(85-75)=137*10=1370
78*214-78*204=78*(214-204)=78*10=780
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(30-2)*5=30*5-2*5=150-10=140
7*(60-2)=7*60-7*2=420-14=406
85*137-75*137=137*(85-75)=137*10=1370
78*214-78*204=78*(214-204)=78*10=780