Please help I’m having a hard time

Answer:
4b³c⁴ + 2b⁴c³
Step-by-step explanation:
5b⁴c³ and 3b⁴c³ have the same variables. Therefore, they are like terms.
4b³c⁴ + 5b⁴c³ - 3b⁴c³
4b³c⁴ + 2b⁴c³