1.求函数的二阶导数:-|||-(1)y=2(x)^2+ln x;-|||-(2)y=(e)^2x-1,-|||-(3) =xcos x ;-|||-(4) =(e)^-tsin t ;-|||-(5) =sqrt ({a)^2-(x)^2}-|||-(6) =ln (1-(x)^2)-|||-(7) =tan x ;-|||-(8) =dfrac (1)({x)^3+1} =-|||-(9) =(1+(x)^2)arctan x ;-|||-(10) =dfrac ({e)^x}(x) ;