表达式3: .0 0 6 8 "x" squared minus .0 0 6 2 "x" plus 6.7 2 7.0068x2−.0062x+6.727
3
表达式4: 1.5 9 9 1 times 10 to the negative 7th power "x" to the 4th power minus 3.9 9 4 4 times 10 to the negative 5th power "x" cubed plus .0 1 0 7 "x" squared minus .1 0 1 "x"1.5991·10−7x4−3.9944·10−5x3+.0107x2−.101x
