1) - 15x³y²1x⁶y = - 15 x³⁺⁶y²⁺¹ = - 15x⁹y³
2) 2a⁵b⁷(-3)ab³c = - 6a⁵⁺¹b⁷⁺³c = - 6a⁶b¹⁰c
1) 13m¹²n⁶ - 6mn⁶ + 8m¹²n⁶ - 7mn⁶ =21m¹²n⁶ - 13mn⁶
2) - 28p⁷k³ + 18p⁷k - 10k³p⁷ - 8kp⁷ + 4 = 10kp⁷ - 38k³p⁷ + 4
1) - 15x³y²1x⁶y = - 15 x³⁺⁶y²⁺¹ = - 15x⁹y³
2) 2a⁵b⁷(-3)ab³c = - 6a⁵⁺¹b⁷⁺³c = - 6a⁶b¹⁰c
1) 13m¹²n⁶ - 6mn⁶ + 8m¹²n⁶ - 7mn⁶ =21m¹²n⁶ - 13mn⁶
2) - 28p⁷k³ + 18p⁷k - 10k³p⁷ - 8kp⁷ + 4 = 10kp⁷ - 38k³p⁷ + 4