Expression 3: StartFraction, 1 Over "X" , EndFraction equals StartFraction, StartRoot, 1 squared plus left parenthesis, 1 plus "X" , right parenthesis squared , EndRoot Over 1 plus "X" , EndFraction1X=12+1+X21+X
3
Expression 4: "X" to the 4th power plus 2 "X" cubed plus "X" squared minus 2 "X" minus 1 tilde 0X4+2X3+X2−2X−1~0