12.求下列函数的导数:-|||-(1) =(e)^-x((x)^2-2x+3) ;-|||-(2) =(sin )^2xcdot sin ((x)^2) ;-|||-(3) =((arctan dfrac {x)(2))}^2 ;-|||-(4) =dfrac (ln x)({x)^n} =-|||-(5) =dfrac (e'-e)(e'+e') ;-|||-(6) =ln cos dfrac (1)(x) ;-|||-(7) =(e)^-(sin ^2dfrac {1)(x)} ;-|||-(8) =sqrt (x+sqrt {x)} ;12.求下列函数的导数:-|||-(1) =(e)^-x((x)^2-2x+3) ;-|||-(2) =(sin )^2xcdot sin ((x)^2) ;-|||-(3) =((arctan dfrac {x)(2))}^2 ;-|||-(4) =dfrac (ln x)({x)^n} =-|||-(5) =dfrac (e'-e)(e'+e') ;-|||-(6) =ln cos dfrac (1)(x) ;-|||-(7) =(e)^-(sin ^2dfrac {1)(x)} ;-|||-(8) =sqrt (x+sqrt {x)} ;