Answer:

Step-by-step explanation:
Given the expression

Remove parentheses: (a)=a

Group like terms

Add similar elements
∵ 
Add similar elements
∵ 
Thus, the equivalent expression in simplified form:

Answer:
poi nts
Step-by-step explanation:
7
Answer:
81x^4+216x^3+216x^2+96x+16
Step-by-step explanation: