Generate Practice Problem (2a^2b^3c^4-6x^3y^4z^5 7l^7m^8n^9)^5 Practice Problem

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The following practice problem has been generated for you:
Combine like terms for 2a² + 4a² + 15a³ + 15a³ + 8a⁴ + 5a² + 6a³