Consider the generalized hypergeometric function: $$ {_3F_2}\left(1,\frac12,\frac12;\ \frac76,\frac{11}{6};\ \frac{4z}{27}\right) $$
I know it can be done with the beta integral as shown below: What is $_3F_2\left(1,\frac32,2;\ \frac43,\frac53;\ \frac4{27}\right)$ as an integral?
the harder problem is how to evaluate the 3f2 expression using the Euler integral . this hard because the integrals are elliptic , involve fractions of 1/3 or 1/6, and there are double integrals. I am guessing one makes substitutions, but there are many possible approaches to this.