Answer:
Top box is +, left box is +, right box is -, bottom box is +
Step-by-step explanation:
Hopefully that makes sense lol
m - 10
7 plus = 7 +
The sum of m and -17 = m + (-17)
7 + (m + -17)
We can get rid of the parentheses
7 + m + -17
Combine like terms
7 + -17 = -10
m + -10
Get rid of the addition sign
3x^2-288y^2-36
Rewrite -36 as 12×3
Rewrite -288 as 96×3
3x^2+96.3y^2+12.3
factor out common term 3
=3(x^2-96y^2-12)
