Answer:
1.) 5^7 2.) 4^a+b 3.) a^c+d
Step-by-step explanation:
If the exponents are number, you can add the numbers together. Do not add the base numbers. ( Ex: 3 + 4 = 7 )(problem 1)
If the exponents are variables, indicate that you are adding the variables by putting an addition sign between the letters.
