Simplify Combining like Terms: - Z2 + 13z2 − 5z + 7z3 − 15z

Simplify combining like terms: - z² + 13z² − 5z + 7z³ − 15z

− z² + 13z² − 5z + 7z³ − 15z = 7z³ − z² + 13z² − 5z − 15z

= 7z³ + z² (−1 + 13) + z (−5 − 15)

= 7z³ + 12z² − 20z

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