dsolve(deq,y(x));
2)
> restart;
> deq:=diff(y(x),x)+y(x)/x=-x*(y(x)^2);
> dsolve(deq,y(x));
4)
> restart;
> deq:=diff(y(x),x$2)+diff(y(x),x)-x*y^2=0;
>
> cond:=y(0)=2,D(y)(0)=2;
5)
> restart;
> deq:=x*diff(y(x),x)-y(x)/(x+1)=x;
> cond:=y(1)=0;
> dsolve({deq,cond},y(x));
3)
> restart;
> deq:=diff(y(x),x$2)+y(x)=1/sin(x);
> dsolve(deq,y(x));
6)
>
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