Try another version of this question
Add the 2 polynomials:
`(-3x^4+6x^3+7x) + (-7x^4-x^3+6)`
`(-3x^4+6x^3+7x) + (-7x^4-x^3+6)`
Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Be sure your variables match those in the question
`-10x^4+5x^3+7x+6`