Combine like terms.
[tex]2 {x}^{2} + 8 {x}^{2} = 10 {x}^{2} [/tex]
[tex]x + 7x = 8x[/tex]
[tex]4 + ( - 3) = 1[/tex]
So, the answer would be
[tex]10 {x}^{2} + 8x + 1[/tex]
