Meijer's G as a parameter of Meijer's G

[mamassie]

Dear All,

thank you in advance for your help

could any one help me how I could have one meijer's G function out of sequential Meijer's G
MeijerG({[a1...am],[am+1...ap]}, {[b1...bn],[bn+1...bq]}, MeijerG({[a1...ar],[ar+1...at]}, {[b1...bs],[bs+1...bu]},x))