(adsbygoogle = window.adsbygoogle || []).push({}); Getting limit of the following function using L'Hopital?

I have tried this question 5 times and each time I get a diff answer. I don't know what I am doing wrong, but here's the question. Any help?

lim

x-> 0

(4/x^2) - (2 / (1 - cos x))

edited - for typo in subject heading

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# Getting derivative of the following function using L'Hopital?

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