Question 61145
( (5x+1)+6y) )^2 [simplify]
 (5x+1+6y)(5x+1+6y)
25x^2+5x+30xy+5x+1+6y+30xy+6y+36y^2 [combine like-terms]
25x^2+36y^2+10x+12y+60xy+1