kill(all)$

van=facebook.com/LearningCalculus$

ode:'diff(y(t),t,2)+4*y = 4*sin(t);

atvalue(y(t),t=0,0);

atvalue('diff(y(t),t),t=0,0);

lap_ode:laplace(ode,t,s);

solution:solve(%,'laplace(y(t),t,s));

map(lambda([eq],ilt(eq,s,t)),solution);