(49 + 56 ) x 7 = 107 x 7 = 735
( 49 + 56 ) x 7 = 49 x7 + 56 x 7 = 343 + 392 = 735
( 180 + 68 ) x 3 = 180 x3 + 68 x3 = 540 + 204 = 744
( 180 + 68 ) x 3 = 248 x 3 = 744
( 408 + 280 ) : 4 = 408 : 4 + 280 : 4 = 102 + 70 = 172
( 408 + 280 ) : 4 = 688 : 4 = 172
( 654 +246 ) : 6 = 654 : 6 + 246 : 6 = 109 + 41 = 150
( 654 + 246 ) : 6 = 900 : 6 = 150