expand : (3x-4y)³ give me answer I will mark as brilliant
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(3x+4y)^3
3x^3+4y^3+3×3x^2×4y+3×3x×4y^2
27x^3+64y^3+12y×9x^2+9x×16y^2
27x^3+64y^3+ 108x^2y+144xy^2
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