Answer:
Option 3- the cubic term
Step-by-step explanation:
Given : Polynomial 
To find : To express the polynomial in standard form, which term should be written first?
Solution :
The given polynomial 
The standard form of polynomial is arranged according to the higher degree to the lowest degree.
The degree is the power, first the higher degree then the lower and last the constant term.
In our given polynomial the highest degree is 3 so it is the first term of the polynomial.
The standard form is 
Therefore, The required result is the cubic term is written first.