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(2*x^-10-28)'The calculation above is a derivative of the function f (x)
(2*x^-10)'+(-28)'
2*(x^-10)'+(2)'*x^-10+(-28)'
2*(x^-10)'+0*x^-10+(-28)'
2*-10*x^(-10-1)+0*x^-10+(-28)'
2*-10*x^-11+0*x^-10+(-28)'
0-20*x^-11
-20*x^-11
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