Answer
4$y^{2}$ + 12y + 19
Work Step by Step
the translation is
( 8$y^{2}$ + 7 ) + ( 6y + 9 ) - ( 4$y^{2}$ -6y - 3 )
( 8$y^{2}$ + 7 ) + ( 6y + 9 ) + (- 4$y^{2}$ +6y + 3 ) add the opposite
8$y^{2}$ + 7 + 6y + 9 - 4$y^{2}$ +6y + 3 )
8$y^{2}$ - 4$y^{2}$ +6y + 6y +7+ 9 + 3 combine like terms
4$y^{2}$ + 12y + 19 simplify