Perform the operation
21.(c³-2cd-6d)+(4c³+11cd-10d)

Perform the operation
[tex] \tt(c^3-2cd-6d)+(4c^3+11cd-10d)[/tex]
Solution:
Using the vertical way
[tex] \tt{ \: \: \: c^3 - 2cd - 6d} \\ + \: \: \tt\underline {4c^3 + 11cd - 10d} \\ \tt \green{ \: \: \: \: \: 5c^3 + 9cd - 16d}[/tex]
Therefore, the answer is [tex] \tt \green{5c^3 + 9cd - 16d}[/tex]