Вот известные проблемы с MathML в Amaya:
display, alttext, mathvariant, mathsize, mathcolor, mathbackground, fontsize, fontweight, fontstyle, fontfamily, color, linethickness, numalign, denomalign, bevelled, notation, lquote, rquote, lspace, rspace, largeop, movablelimits, subscriptshift, superscriptshift, form, width (только mspace), height (только mspace), depth (mspace only), align, rowalign, columnalign, frame, framespacing, displaystyle, side, rowspan, columnspan, rowspacing, columnspacing, rowlines, columnlines.
Therefore, SuchThat, DownTee, Or, And, Not, Exists, ForAll, Element, NotElement, NotSubset, Subset, SubsetEqual, Superset, SupersetEqual, DoubleLeftArrow, DoubleLeftRightArrow, DoubleRightArrow, LeftArrow, LeftRightArrow, RightArrow, Congruent, GreaterEqual, le, NotEqual, Proportional, VerticalBar, Union, Intersection, PlusMinus, CirclePlus, Sum, Integral, CircleTimes, Product, CenterDot, Diamond, PartialD, DoubleDownArrow, DoubleUpArrow, DownArrow, UpArrow, ApplyFunction, TripleDot, DifferentialD, ImaginaryI, ExponentialE, InvisibleComma, UnderBar, OverBar, ThinSpace, ThickSpace, Hat, OverBar, UnderBar, prime, Prime.