updated 's6_2_5_table1' to use the 'Expr' type where possible; contributes to issue #272
updated 's6_2_5_table1' to use the 'Expr' type where possible; contributes to issue #272

JacquesCarette/literate-scientific-software,JacquesCarette/literate-scientific-software,JacquesCarette/literate-scientific-software,JacquesCarette/literate-scientific-software,JacquesCarette/literate-scientific-software,JacquesCarette/literate-scientific-software,JacquesCarette/literate-scientific-software