3.求下列函数的微分:-|||-(1) =dfrac (1)(x)+2sqrt (x);-|||-(2) =xsin 2x;-|||-(3) =dfrac (x)(sqrt {{x)^2+1}}-|||-(4) =(ln )^2(1-x);-|||-(5) y=x^2e^2x;-|||-(6) =(e)^-xcos (3-x);-|||-(7) =arcsin sqrt (1-{x)^2};-|||-(8) =(tan )^2(1+2(x)^2);-|||-(9) =arctan dfrac (1-{x)^2}(1+{x)^2};-|||-(10) =Asin (omega t+varphi ).