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((sin(7*x))^4)'The calculation above is a derivative of the function f (x)
4*(sin(7*x))^(4-1)*(sin(7*x))'
4*(sin(7*x))^(4-1)*cos(7*x)*(7*x)'
4*(sin(7*x))^(4-1)*cos(7*x)*((7)'*x+7*(x)')
4*(sin(7*x))^(4-1)*cos(7*x)*(0*x+7*(x)')
4*(sin(7*x))^(4-1)*cos(7*x)*(0*x+7*1)
4*(sin(7*x))^(4-1)*7*cos(7*x)
28*(sin(7*x))^3*cos(7*x)
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