Question: permutation, my answer is incorrect How many functions exist with the signature Za Zb? Express your answer numerically using plain text without spaces. Use /
permutation, my answer is incorrect

How many functions exist with the signature Za Zb? Express your answer numerically using plain text without spaces. Use / and ^ and ! to represent division, exponentiation and factorial. Use parenthesis around a term only if it is necessary. Examples: 1/(x-1), (x-3)/10, x!, (x-1)!, x^2, 2^(x-1), etc. 1/(x)
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