Where can I locate the evidence of the adhering to identifications of Ramanujan
These are 2 renowned identifications of Ramanujan . Where can I locate the evidence of them :

$ \displaystyle \frac{1}{\pi} = \frac{2\sqrt{2}}{9801} \sum\limits_{k=0}^{\infty} \frac{(4k!)(1103 + 26390k)}{(k!)^{2} (396)^{4k}}$

$\displaystyle \int\limits_{0}^{\infty} \frac{1 + x^{2}/(b+1)^{2}}{1+x^{2}/a^{2}} \times \frac{1+ x^{2}/(b+2)^{2}}{1 + x^{2}/(a+1)^{2}} \times \cdots dx= \frac{\sqrt{\pi}}{2} \times \frac{\Gamma(a+1) \Gamma(b+\frac{1}{2}) \Gamma(ba+\frac{1}{2}}{\Gamma(a)\Gamma(b+\frac{1}{2} \Gamma(ba+1)}$ for $0 < a < b+\frac{1}{2}$.
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