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I am inquiring as to why integration variables cannot be interpreted using this method:

[tex]\frac{d}{dx} (x^n) = nx^{n - 1}[/tex]

[tex]\int nx^{n - 1} dx = x^n + A[/tex]

[tex]\frac{d^2}{dx^2} (x^n) = n(n - 1)x^{n - 2}[/tex]

[tex]\int n(n - 1)x^{n - 2} dx^2 = x^n + A + Bx[/tex]

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# Invalid Integration Variables

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