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Question: Automatic simplifications not working?

Question:Automatic simplifications not working?

nullpspace 5 Maple 2022
syntax 2dmath incomplete-question
February 26 2023
1

Hi,

I am new to Maple and I couldn't really find anything about this problem. Why doesn't Maple automatically simplify the last expression in the following? (see for example the first and last terms, as well as other terms)

total := (((((D^2/(alpha^2*mu^2) + D^2*exp(2*(-t + t1)*alpha*mu)/(alpha^2*mu^2)) + D^2*exp(2*(-t + t1)*alpha*mu)/(alpha^2*mu^2)) + D1*D/((alpha*mu*tau0 + 1)*alpha^2*mu^2) - (-alpha*mu*tau0*exp((-t + t1)*(alpha*mu*tau0 + 1)/tau0) + exp(2*(-t + t1)*alpha*mu))*D*D1/(mu^2*alpha^2*(alpha^2*mu^2*tau0^2 - 1)) + (alpha*mu*tau0*exp((-t + t1)*(alpha*mu*tau0 + 1)/tau0) - exp(2*(-t + t1)*alpha*mu))*D1*D/(alpha^2*mu^2*(alpha^2*mu^2*tau0^2 - 1))) - (-alpha*mu*tau0*exp((-t + t1)*(alpha*mu*tau0 + 1)/tau0) + exp(2*(-t + t1)*alpha*mu))*D*D1/(mu^2*alpha^2*(alpha^2*mu^2*tau0^2 - 1))) + (alpha*mu*tau0*exp((-t + t1)*(alpha*mu*tau0 + 1)/tau0) - exp(2*(-t + t1)*alpha*mu))*D1*D/(alpha^2*mu^2*(alpha^2*mu^2*tau0^2 - 1)) + D1*D/((alpha*mu*tau0 + 1)*alpha^2*mu^2) + D1^2/((alpha*mu*tau0 + 1)^2*alpha^2*mu^2) - (alpha*mu*tau0*exp(-(-t + t1)*(alpha*mu*tau0 - 1)/tau0) + alpha*mu*tau0*exp((-t + t1)*(alpha*mu*tau0 - 1)/tau0) - alpha^2*mu^2*tau0^2 - 1)*D1^2/(alpha^2*mu^2*(alpha^4*mu^4*tau0^4 - 2*alpha^2*mu^2*tau0^2 + 1))) - (alpha*mu*tau0*exp(-(-t + t1)*(alpha*mu*tau0 - 1)/tau0) + alpha*mu*tau0*exp((-t + t1)*(alpha*mu*tau0 - 1)/tau0) - alpha^2*mu^2*tau0^2 - 1)*D1^2/(alpha^2*mu^2*(alpha^4*mu^4*tau0^4 - 2*alpha^2*mu^2*tau0^2 + 1))

D1^2/((alpha*mu*tau0 + 1)^2*alpha^2*mu^2) + 2*D1*D/((alpha*mu*tau0 + 1)*alpha^2*mu^2) + D^2/(alpha^2*mu^2)

r2r2 := %;
 

total - r2r2;

((((((D^2/(alpha^2*mu^2) + D^2*exp(2*(-t + t1)*alpha*mu)/(alpha^2*mu^2)) + D^2*exp(2*(-t + t1)*alpha*mu)/(alpha^2*mu^2)) + D1*D/((alpha*mu*tau0 + 1)*alpha^2*mu^2) - (-alpha*mu*tau0*exp((-t + t1)*(alpha*mu*tau0 + 1)/tau0) + exp(2*(-t + t1)*alpha*mu))*D*D1/(mu^2*alpha^2*(alpha^2*mu^2*tau0^2 - 1)) + (alpha*mu*tau0*exp((-t + t1)*(alpha*mu*tau0 + 1)/tau0) - exp(2*(-t + t1)*alpha*mu))*D1*D/(alpha^2*mu^2*(alpha^2*mu^2*tau0^2 - 1))) - (-alpha*mu*tau0*exp((-t + t1)*(alpha*mu*tau0 + 1)/tau0) + exp(2*(-t + t1)*alpha*mu))*D*D1/(mu^2*alpha^2*(alpha^2*mu^2*tau0^2 - 1))) + (alpha*mu*tau0*exp((-t + t1)*(alpha*mu*tau0 + 1)/tau0) - exp(2*(-t + t1)*alpha*mu))*D1*D/(alpha^2*mu^2*(alpha^2*mu^2*tau0^2 - 1)) + D1*D/((alpha*mu*tau0 + 1)*alpha^2*mu^2) + D1^2/((alpha*mu*tau0 + 1)^2*alpha^2*mu^2) - (alpha*mu*tau0*exp(-(-t + t1)*(alpha*mu*tau0 - 1)/tau0) + alpha*mu*tau0*exp((-t + t1)*(alpha*mu*tau0 - 1)/tau0) - alpha^2*mu^2*tau0^2 - 1)*D1^2/(alpha^2*mu^2*(alpha^4*mu^4*tau0^4 - 2*alpha^2*mu^2*tau0^2 + 1))) - (alpha*mu*tau0*exp(-(-t + t1)*(alpha*mu*tau0 - 1)/tau0) + alpha*mu*tau0*exp((-t + t1)*(alpha*mu*tau0 - 1)/tau0) - alpha^2*mu^2*tau0^2 - 1)*D1^2/(alpha^2*mu^2*(alpha^4*mu^4*tau0^4 - 2*alpha^2*mu^2*tau0^2 + 1))) - D1^2/((alpha*mu*tau0 + 1)^2*alpha^2*mu^2) - 2*D1*D/((alpha*mu*tau0 + 1)*alpha^2*mu^2) - D^2/(alpha^2*mu^2)
couldnt insert "r2r2" properly...
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