Algebra
posted by Mary .
add
(3c^42c^3+11c9)+(c^5+7c^3+4c^23c+6)+(6c^4+c^25c5)

Add up the terms with the same power of c, and add up the constants. Then write them down as a new polynomial.
c^5 3c^4 + ___c^3 + ___c^2 + ___c 8
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