\pi={1\over2^6}\sum_{k=0}^{\infty}{{(-1)^n\over2^{10n}}\cdot[-{2^5\over4n+1}-{1\over4n+3}+{2^8\over10n+1}-{2^6\over10n+3}-{2^2\over10n+5}-{2^2\over10n+7}+{1\over10n+9}]}