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(7/x-5)'The calculation above is a derivative of the function f (x)
(7/x)'+(-5)'
((7)'*x-(7*(x)'))/(x^2)+(-5)'
(0*x-(7*(x)'))/(x^2)+(-5)'
(0*x-(7*1))/(x^2)+(-5)'
0-7/(x^2)
-7/(x^2)
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