(987- 879)×6 900-139×5
2×(293+63) 4×197-189
3×242+824÷4 (4×209-228)÷8

(987-879)*6=108*6=648900-139*5=900-695=2052*(293+63)=2*356=7124*197-189=788-189=5993*242+824/4=726+206=932(4*209-228)/8=608/8=76