Looking at the second, third, and fourth options, we see that the highest powers are greater than two, which automatically disqualifies them from being quadratics (since the highest power in a quadratic is 2).
This makes the first option the correct choice since the expansion of the equation gives
A composition is operation between function that consist in replacing the independent variable of the first function, in this case, for . Common notations for composition between functions are and . If we know that and , then .