Expression 88: gamma equals "l" "i" "m" Subscript, "x" to 1 , Baseline Start sum from "t" equals 1 to infinity , end sum, StartFraction, left parenthesis, "t" plus 1 minus "x" , right parenthesis left parenthesis, "t" plus "x" , right parenthesis Superscript, "x" , Baseline minus "t" Superscript, "x" , Baseline left parenthesis, "t" plus "x" , right parenthesis Over "t" left parenthesis, 1 minus "x" , right parenthesis left parenthesis, "t" plus "x" , right parenthesis , EndFraction equals "l" "i" "m" Subscript, "x" to 1 , Baseline Start sum from "t" equals 1 to infinity , end sum, StartFraction, left parenthesis, "t" plus 1 minus "x" , right parenthesis left parenthesis, "t" plus "x" , right parenthesis Superscript, "x" minus 1 , Baseline minus "t" Superscript, "x" , Baseline Over "t" left parenthesis, 1 minus "x" , right parenthesis , EndFractionฮณ=limxโ1โโโt=1t+1โxt+xxโtxt+xt1โxt+xโ=limxโ1โโโt=1t+1โxt+xxโ1โtxt1โxโ