Hi, I am trying to add some useful inverse Laplace transforms to Maple's integral tables. I am frustrated that these transforms will only be recognized subsequently if they are entered in exactly the same format. For example, if I type: invlaplace(exp(-p*sqrt(s)/s),s,t); I get: invlaplace(exp(-p/s^(1/2)),s,t) but if I add this transform to the table: addtable(invlaplace,exp(-p*sqrt(s)/s),erfc(p/(2*sqrt(t))),s,t); then I get: invlaplace(exp(-p*sqrt(s)/s),s,t); erfc(1/2*p/t^(1/2)) However, if I change the p to an alpha: invlaplace(exp(-alpha*sqrt(s)/s),s,t);