>> syms t
exp(-2*t)*(sin(2*t+sym(pi)/3)+cos(3*t))
ans =
exp(-2*t)*(sin(2*t+1/3*pi)+cos(3*t))
>> y=dsolve(['D5y+13*D4y+64*D3y+152*D2y+176*Dy+80*y=',...
'exp(-2*t)*(sin(2*t+1/3*pi)+cos(3*t))'],'y(0)=1','y(1)=3','y(pi)=2',...
'Dy(0)=1','Dy(1)=2')
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