36 + 4 – 10 = 26 + 2 – 13 = (78 - 8) - (50 + 10 ) = (38 - 8) + (40 + 10 ) = ( 46 + 12 ) – 5 = ( 56 + 22 ) – 4 = 74 + ( 38 – 14 ) = 64 - ( 18 – 14 ) = ( 28+12)+( 21-1) -2 = ( 18+11)-( 11-7) -1 = 36 + 4 – 10 = 26 + 2 – 13 = (78 - 8) - (50 + 10 ) = (38 - 8) + (40 + 10 ) = ( 46 + 12 ) – 5 = ( 56 + 22 ) – 4 = 74 + ( 38 – 14 ) = 64 - ( 18 – 14 ) = ( 28+12)+( 21-1) -2 = ( 18+11)-( 11-7) -1 =