Expression too long to display! in wxMaxima



Hello
I need help for this
 I wrote this in wxMaxima
(%i1) assume_pos:true;eq1:m*'diff(x,t,2)+k*x=sin(w*t);(%o1) true(%o2)
m*('diff(x,t,2))+k*x=sin(t*w)(%i3) ode2(%, x, t);
 << Expression too long to display! >>