Answer :
[tex]( 7{c}^{3} {d}^{2} + 2b {c}^{2} d + ab) - ( - 4 {c}^{3} {d}^{2} + ab - 7b {c}^{2} d) \\ 7{c}^{3} {d}^{2} + 2b {c}^{2} d + ab+ 4 {c}^{3} {d}^{2} - ab + 7b {c}^{2} d) \\7{c}^{3} {d}^{2} + 4 {c}^{3} {d}^{2} + 2b {c}^{2}d + 7b {c}^{2} d + ab - ab \\ 11 {c}^{3} {d}^{2} + 9b {c}^{2} d[/tex]
PLEASE GIVE BRAINLIEST