When this is written out the equation will look like...
4x^3 + 4x
Now we must substitute a 4 in for all x’s in the equation.
4(4)^3 + 4(4)
Use the order of operations to solve. Raise 4 to the 3rd power.
4(64) + 4(4)
Multiply where it is needed (the 4(64) and the 4(4))
256 + 16
Add the two numbers together.
272 is your answer
Hope this helps!