sub1.AXMathSubscript.AXChildren.count=1
sub1.AXMathSubscript.AXChildren[0].AXValue='2'
sub2.AXMathSubscript=NULL
subsup1.AXMathSubscript.AXChildren.count=1
subsup1.AXMathSubscript.AXChildren[0].AXValue='2'
subsup2.AXMathSubscript=NULL