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(3*x-x-(2/4))'The calculation above is a derivative of the function f (x)
(3*x-x)'+(-(2/4))'
(3*x)'+(-x)'+(-(2/4))'
3*(x)'+(-x)'+(3)'*x+(-(2/4))'
3*(x)'+(-x)'+0*x+(-(2/4))'
(-x)'+0*x+3*1+(-(2/4))'
(-(2/4))'-1+3
2
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