5 × 13 - 5 × 3 = 5 × ( 13 - 3 ) = 5 × 10 = 50
19 + 19 × 9 = 19 × ( 1 + 9 ) = 19 × 10 = 190
23 × 11 - 23 = 23 × ( 11 - 1 ) = 23 × 10 = 230
7 × 8 + 2 × 7 + 10 × 7 = 7 × ( 8 + 2 + 10 ) = 7 × 20 = 140
41 × 132 - 41 × 32 = 41 × ( 132 - 32 ) = 41 × 100 = 4 100
