410728-1.xml (337B)
1 <?xml version="1.0"?> 2 <!DOCTYPE html PUBLIC 3 "-//W3C//DTD XHTML 1.1 plus MathML 2.0//EN" 4 "http://www.w3.org/TR/MathML2/dtd/xhtml-math11-f.dtd" 5 [ 6 <!ENTITY mathml "http://www.w3.org/1998/Math/MathML"> 7 ]> 8 <math display="block" xmlns="&mathml;"> 9 <mi>f ̲</mi> 10 <mi>-</mi> 11 <mo>+</mo> 12 <mo> -</mo> 13 <mo>̲</mo> 14 </math>