Add:

(4s^5 - s^4 + 8) + (6s^5 - s - 2)

= 4s^5 - s^4 + 8 + 6s^5 - s - 2 {took out parentheses}

=

**10s^5 - s^4 - s + 6** {combined like terms and wrote in decreasing order of exponents}

Add:

(7x^3 - 7x^6 - 7) + (-5x^6 + 5 -7x^3)

= 7x^3 - 7x^6 - 7 - 5x^6 + 5 - 7x^3 {took out parentheses}

=

**-12x^6 - 2 **{combined like terms}

*- Algebra House*
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