Okay, here we have this:
Considering the provided function, we are going to find the requested values, so we obtain the following:
f(0):
f(0)=5(0)-2
f(0)=0-2
f(0)=-2
f(1):
f(1)=5(1)-2
f(1)=5-2
f(1)=3
f(4):
f(4)=5(4)-2
f(4)=20-2
f(4)=18
f(6)
f(6)=6³-4
f(6)=6³-4
f(6)=216-4
f(6)=212