See Eric Nicholas K's answer to lana <3's Secondary 3 A Maths Singapore question

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I will do this question as though the question is asking for the term independent of x or the constant term.

Eric Nicholas K

3 years ago

Note that 1 divided by (2x^4) is not the same as 2x^(-4).

The 2 still remains in the denominator even as we bring the x to the numerator.