表达式2: left parenthesis, left parenthesis, 1 minus StartAbsoluteValue, "t" , EndAbsoluteValue , right parenthesis times "N" , "t" times left parenthesis, 1 minus StartAbsoluteValue, "N" , EndAbsoluteValue , right parenthesis , right parenthesis1−t·N,t·1−N
2
表达式3: left parenthesis, sign left parenthesis, mod left parenthesis, "t" , 2 , right parenthesis minus 1 , right parenthesis times left parenthesis, 1 minus left parenthesis, 1 minus mod left parenthesis, "t" , 1 , right parenthesis , right parenthesis times StartAbsoluteValue, "N" , EndAbsoluteValue , right parenthesis , sign left parenthesis, mod left parenthesis, StartFraction, "t" Over 2 , EndFraction , 2 , right parenthesis minus 1 , right parenthesis left parenthesis, 1 minus mod left parenthesis, "t" , 1 , right parenthesis times left parenthesis, 1 minus StartAbsoluteValue, "N" , EndAbsoluteValue , right parenthesis , right parenthesis , right parenthesissignmodt,2−1·1−1−modt,1·N,signmodt2,2−11−modt,1·1−N
3
表达式4: "N" equals StartFraction, left bracket, negative "n" ... "n" , right bracket Over "n" , EndFractionN=−n...nn
