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How to specify a variable as integer in Wolfram|Alpha?

Posted 16 days ago
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I want to get the Laurent expansion of a function, say pi/sin(pi*z) near z=n where n is an integer, but Wolfram|Alpha doesn't understand n is integer, it assumes n is just another variable. how do I trick it so it will give me the correct answer?

"Laurent expansion of pi/sin(z*pi) at z=n and n is an integer" doesn't work

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