automatic_names('true')

y=function('y',x)
d=diff(y,x,3)-diff(y,x,2)+100*diff(y,x,1)-100*y==0
desolve_laplace(d,[y,x],ics=(0,4,11,22))
 

sol:
422/101*e^x + 689/1010*sin(10*x) - 18/101*cos(10*x)