# Question:why 'combine' command is not working for this expression?.how do i combine the all exponential terms?.

## Question:why 'combine' command is not working for this expression?.how do i combine the all exponential terms?.

Maple

Ty4 :=combine(-(chi*omega^2+2*omega)*cos(omega*(Upsilon+b1))*P1*(3*exp(-3*omega)*kappa+exp(-omega)*kappa+exp(-omega*(2*d1+1))*kappa^2+3*exp(-omega*(2*d1+3))*kappa^2-2*exp(-omega*(2*d1+3))*omega-4*exp(-3*omega)*omega^2-2*exp(-omega*(2*d1+3))*d1*kappa*nu__p^2*omega+4*exp(-omega*(2*d1+3))*d1*kappa*nu__p*omega+2*exp(-omega*(2*d1+1))*d1*kappa*nu__p^2*omega+4*exp(-omega*(2*d1+1))*d1*kappa*nu__p*omega-exp(-3*omega)*kappa*nu__p^2+exp(-omega)*kappa*nu__p^2+exp(-omega*(2*d1+1))*kappa^2*nu__p^2-exp(-omega*(2*d1+3))*kappa^2*nu__p^2+2*exp(-omega*(2*d1+1))*d1*kappa*omega-8*exp(-omega*(2*d1+3))*d1*nu__p^2*omega^3-16*exp(-omega*(2*d1+3))*d1*nu__p*omega^3-4*exp(-omega*(2*d1+3))*kappa*nu__p^2*omega^2-8*exp(-omega*(2*d1+3))*kappa*nu__p*omega^2+6*exp(-omega*(2*d1+3))*d1*kappa*omega-4*exp(-3*omega)*kappa*nu__p*omega+4*exp(-3*omega)*d1*nu__p^2*omega^2+8*exp(-3*omega)*d1*nu__p*omega^2-2*exp(-3*omega)*kappa*nu__p^2*omega+2*exp(-3*omega)*kappa*nu__p+2*exp(-omega)*kappa*nu__p+2*exp(-omega*(2*d1+1))*kappa^2*nu__p+2*exp(-omega*(2*d1+3))*kappa^2*nu__p-8*exp(-omega*(2*d1+3))*d1*omega^3-4*exp(-omega*(2*d1+3))*nu__p*omega-2*exp(-omega*(2*d1+3))*nu__p^2*omega-4*exp(-omega*(2*d1+3))*kappa*omega^2-2*exp(-3*omega)*kappa*omega-4*exp(-3*omega)*nu__p^2*omega^2+4*exp(-3*omega)*d1*omega^2-8*exp(-3*omega)*nu__p*omega^2)*exp(-omega*(1-d1-chi))/(omega*(4*exp(-2*omega)*nu__p^2*omega^2+8*exp(-2*omega)*nu__p*omega^2-exp(-4*omega)*nu__p^2+2*exp(-2*omega)*nu__p^2+4*exp(-2*omega)*omega^2+2*exp(-4*omega)*nu__p-4*exp(-2*omega)*nu__p-nu__p^2+3*exp(-4*omega)+10*exp(-2*omega)+2*nu__p+3)*(kappa+1)*Pi),exp);

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