In [26]:
from sympy import *
from IPython.display import Latex as render_latex
k_i, m, i = symbols("k_i m i")
render_latex('$'+latex(Sum(k_i**2, (i, 1, m)))+'$')


Out[26]:
$\sum_{i=1}^{m} k_{i}^{2}$

In [ ]: