An algebra problem by Rodchananat Khunakornophat

Algebra Level pending

Let A(x) = | 5 - | 5 - | 5 - |...... - | 5-x||||

And there are 2015 5's in A

If M equal sum of all solution of the equation A(x) = 3

And N equal number of x that satisfy in equation A(x) = 4

Find. (M² - N² )/ MN

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