La Serie de los recíprocos de los cuadrados

\sum_{n=1}^{∞ }{\frac{1}{n^{2}} }= \frac{\pi^{2}}{6}

k = 1 (slider from 1 to 12001, step 1)
recipcuadrados = Sequence((1 / n)^(2), n, 1, k)
a = Sum(recipcuadrados)
texto1: "\sum_{n=1}^{" + (LaTeX[k]) + "}{\frac{1}{n^{2}} }=" + (LaTeX[a]) + ""