Expression 1: "y" equals left parenthesis, "e" Superscript, negative left parenthesis, StartFraction, "t" Over 10 , EndFraction , right parenthesis , Baseline plus "e" Superscript, left parenthesis, StartFraction, left parenthesis, abs left parenthesis, "x" , right parenthesis minus 127 , right parenthesis Over 10 , EndFraction , right parenthesis , Baseline times left parenthesis, 1 minus "e" Superscript, negative left parenthesis, StartFraction, "t" Over 10 , EndFraction , right parenthesis , Baseline , right parenthesis , right parenthesis "x"y=e−t10+eabsx−12710·1−e−t10x