Expression 1: "f" equals StartFraction, 1 Over StartRoot, 4 plus "t" , EndRoot , EndFraction plus left parenthesis, 2 minus 0.1 "t" , right parenthesis exponent left parenthesis, negative "x" squared , right parenthesis plus left parenthesis, 1 plus 0.2 "t" , right parenthesis exponent left parenthesis, negative left parenthesis, 2 "x" minus 7 , right parenthesis squared , right parenthesis plus 3exponent left parenthesis, negative left parenthesis, "x" minus 8 plus 0.1 "t" , right parenthesis squared , right parenthesis left brace, "x" greater than negative 1 minus 0.2 "t" , right brace left brace, "x" less than 14 plus 0.2 "t" , right bracef=14+t+2−0.1texp−x2+1+0.2texp−2x−72+3exp−x−8+0.1t2x>−1−0.2tx<14+0.2t