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First, apply distributive property:
= 4𝑦 * 3𝑦^6 + 4𝑦 * 9^𝑦 + 4𝑦 * 8 + 3 * 3𝑦^6 + 3 * 9^𝑦 + 3 * 8
Next, simplify each term:
= 12𝑦^7 + 36𝑦 + 32 + 9𝑦^6 + 27^𝑦 + 24
Combine like terms:
= 12𝑦^7 + 9𝑦^6 + 36𝑦 + 27𝑦 + 32 + 24
Finally, simplify further:
= 12𝑦^7 + 9𝑦^6 + 63𝑦 + 56