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(9*x^8*e^x)'The calculation above is a derivative of the function f (x)
(9*x^8)'*e^x+9*x^8*(e^x)'
((9)'*x^8+9*(x^8)')*e^x+9*x^8*(e^x)'
(0*x^8+9*(x^8)')*e^x+9*x^8*(e^x)'
(0*x^8+9*8*x^(8-1))*e^x+9*x^8*(e^x)'
(0*x^8+9*8*x^7)*e^x+9*x^8*(e^x)'
72*x^7*e^x+9*x^8*(e^x)'
72*x^7*e^x+9*x^8*ln(e)*e^x
72*x^7*e^x+9*x^8*e^x
72*x^7*e^x+9*x^8*e^x
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