Find the answer with solution (7m+1)^3

"Cube of binomial:

a) Cube the first term: (7m)³ = 343m³

b) Thrice (first term)² (last term): 3(7m)²(1) = 147m²

c) Thrice (first term) (last term)²: 3(7m)(1)² = 21m

d) Cube the last term: (1)³ = 1

ANSWER: 343m³ + 147m² + 21m + 1"