Answer:
[tex]x^{4}-6x^{3}+x^{2}+138x-35x^{2}-4x-6x^{3}-34x^{2}+134x+1[/tex]
Steps:
[tex]x^{4}-6x^{3}+x^{2}+138x-35x^{2}-4x+1[/tex]
Group like terms:
[tex]x^{4}-6x^{3}+x^{2}-35x^{2}+138x-4x+1[/tex]
Add similar elements: 138x-4x=134x
[tex]x^{4}-6x^{3}+x^{2}-35x^{2}+134x+1[/tex]
Add similar elements: x^2-35x^2=-34x^2
[tex]x^{4}-6x^{3}+x^{2}-35x^{2}+134x+1[/tex]
