Answer:
12f+49g
Step-by-step explanation:

The top half is called the numerator.
The bottom is called the denominator.
Answer:
4a³+3a-3
Step-by-step explanation:
You can solve this by combining like terms. Add the numbers with the correct exponents together.
-a³+5a³
4a-a
Thus, the answer is
4a³+3a-3