Example 2: Find a particular solution of .

> diff(a*exp(x)*sin(x)+b*exp(x)*cos(x),x,x)-3*diff(a*exp(x)*sin(x)+b*exp(x)*cos(x),x)+2*(a*exp(x)*sin(x)+b*exp(x)*cos(x))-exp(x)*sin(x);

> p:=unapply(%,x);

> solve({p(0)=0,p(1)=0},{a,b});

Hence .