kill(all);

van=facebook.com/LearningCalculus$

a:sum(n^2/(2*n-1)!,n,1,inf)=1/4*(2*sinh(1)+3*cosh(1));

b:sum(n^2/(2*n+1)!,n,1,inf)=(%e^2-3)/(8*%e);

a*b;

float(rhs(%));