under1.AXMathUnder.AXChildren.count=1
under1.AXMathUnder.AXChildren[0].AXValue='2'
under2.AXMathUnder=NULL
underover1.AXMathUnder.AXChildren.count=1
underover1.AXMathUnder.AXChildren[0].AXValue='2'
underover2.AXMathUnder=NULL