1
error: Element “semantics” from namespace “http://www.w3.org/1998/Math/MathML” is missing one or more of the following child elements: [abs, and, apply, approx, arccos, arccosh, arccot, arccoth, arccsc, arccsch, arcsec, arcsech, arcsin, arcsinh, arctan, arctanh, arg, card, cartesianproduct, ceiling, ci, cn, codomain, complexes, compose, conjugate, cos, cosh, cot, coth, csc, csch, csymbol, curl, declare, determinant, diff, divergence, divide, domain, emptyset, eq, equivalent, eulergamma, exists, exp, exponentiale, factorial, factorof, false, floor, fn, forall, gcd, geq, grad, gt, ident, image, imaginary, imaginaryi, implies, in, infinity, int, integers, intersect, interval, inverse, lambda, laplacian, lcm, leq, limit, list, ln, log, lt, maction, maligngroup, malignmark, matrix, matrixrow, max, mean, median, menclose, merror, mfenced, mfrac, mi, min, minus, mmultiscripts, mn, mo, mode, moment, mover, mpadded, mphantom, mroot, mrow, ms, mspace, msqrt, mstyle, msub, msubsup, msup, mtable, mtext, munder, munderover, naturalnumbers, neq, not, notanumber, notin, notprsubset, notsubset, or, outerproduct, partialdiff, pi, piecewise, plus, power, primes, product, prsubset, quotient, rationals, real, reals, reln, rem, root, scalarproduct, sdev, sec, sech, selector, semantics, set, setdiff, sin, sinh, subset, sum, tan, tanh, tendsto, times, transpose, true, union, variance, vector, vectorproduct, xor]