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((1/2)*sin(pi*x)+7)'The calculation above is a derivative of the function f (x)
((1/2)*sin(pi*x))'+(7)'
(1/2)'*sin(pi*x)+(1/2)*(sin(pi*x))'+(7)'
0*sin(pi*x)+(1/2)*(sin(pi*x))'+(7)'
0*sin(pi*x)+(1/2)*cos(pi*x)*(pi*x)'+(7)'
0*sin(pi*x)+(1/2)*cos(pi*x)*((pi)'*x+pi*(x)')+(7)'
0*sin(pi*x)+(1/2)*cos(pi*x)*(0*x+pi*(x)')+(7)'
0*sin(pi*x)+(1/2)*cos(pi*x)*(0*x+pi*1)+(7)'
0*sin(pi*x)+(1/2)*pi*cos(pi*x)+(7)'
1/2*pi*cos(pi*x)+0
(1/2)*pi*cos(pi*x)
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