Verified answer

Объяснение:

-2а² * (а+b-c) = -2a² * a - 2a²b - 2a² * (-c) = -2a² - 2a²b + 2a²c

-5 c³ (c-f-4c + v) = -5c³ * (-3c - f + v) = 15 c⁴ + 5c³f - 5c³v

-6v⁴ * (v²-g+r) = -6v⁴ * v² - 6v⁴ * (-g) - 6rv⁴ = -6v⁶ + 6 gv⁴- 6rv⁴