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Automatic simplifications not working?

February 26, 2023, 1:34 am
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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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