Answer:
Correct option is:
D. [tex]23x^3+14x[/tex]
Step-by-step explanation:
We have to find the sum:
[tex]19x^3+(14x+4x^3)[/tex]
Combining the like terms, we get
[tex](19+4)x^3+14x[/tex]
=[tex]23x^3+14x[/tex]
Hence, Correct option is:
D. [tex]23x^3+14x[/tex]