1.求下列微分方程的通解:-|||-(1) '-yln y=0 ;-|||-(2) (x)^2+5x-5y'=0 ;-|||-(3) sqrt (1-{x)^2}y'=sqrt (1-{y)^2} ;-|||-(4) '-xy'=a((y)^2+y') ;-|||-(5) (sec )^2xtan ydx+(sec )^2ytan xdy=0 ; .-|||-(6) dfrac (dy)(dx)=(10)^x+y =-|||-(7) ((e)^x+y-(e)^x)dx+((e)^x+y+(e)^y)dy=0 ;-|||-(8) cos xsin ydx+sin xcos ydy=0 ;-|||-(9) ((y+1))^2dfrac (dy)(dx)+(x)^3=0 =-|||-(10) +((x)^2-4x)dy=0 _