well this problem seems pretty long. can someone show me this step by step?

If f(x)= -4x²+2x-3, evaluate:

f(y+1) and 2f(5)

the first thing i did was get these:

-4(y+1)²+2(y+1)-3=??

2[-4(5)²+2(5)-3]=??

if i did something wrong, please tell me. and if not i would like to see how it is done. thanks.