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What is the differential of (14x^3-3x^2)^3

Chain Rule- Differential of the bracket x the initial power of the bracket x the initial bracket^power-1--- So Differential of bracket is 42x²- 6x---Power of bracket is 3 ---Initial bracket^power-1is (14x³-3x²)²---So dy/dx = (42x²-6x)(3)(14x³-3x²)²

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What is the differential of (14x^3-3x^2)^3

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