Sum¶ Symbolic summation. $ wo 'Sum[k, {k, 1, 10}]' 55 $ wo 'Sum[k^2, {k, 1, n}]' (n*(1 + n)*(1 + 2*n))/6 $ wo 'Sum[1/k^2, {k, 1, Infinity}]' Pi^2/6