12 10 x 30 July 8, 2019 16 32 64 128 (- 12 10 x (- 20 30 )= 10 12 x 8 30 300 x 12 x 10 3000 x 12 x 10 30xy - 12x + 10y - 4 10 000 x 12 x 30 30000 x 12 x 10 30 10 x 12 atv tires 12 × 30
