Question 888876
Add like terms. 
Example:
{{{(3x^2+x+3)+(x^4+2x^2+5)=x^4+(3x^2+2x^2)+x+(3+5)}}}
{{{(3x^2+x+3)+(x^4+2x^2+5)=x^4+5x^2+x+8}}}