please help me with it its too far for me

Answer:
sure
^3 represents cube
Step-by-step explanation:
(iv)5x-1
ans= (5x-1)^3
=125x^3-1
so the answer is 125x^3-1.
(v)2a+b
ans=(2a+b)^3
= 8x^3+b^3
so the answer is 8x^3+b^3.
(vi)3x+10
ans=(3x+10)^3
=27x^3+1000
so the answer is 27x^3+1000
I hope my answer helps.