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overflow=\"scroll\">\n                        <mml:mi>f<\/mml:mi>\n                        <mml:mo>(<\/mml:mo>\n                        <mml:mi>x<\/mml:mi>\n                        <mml:mo>+<\/mml:mo>\n                        <mml:mi>y<\/mml:mi>\n                        <mml:mo>,<\/mml:mo>\n                        <mml:mi>z<\/mml:mi>\n                        <mml:mo>+<\/mml:mo>\n                        <mml:mi>w<\/mml:mi>\n                        <mml:mo>)<\/mml:mo>\n                        <mml:mo>+<\/mml:mo>\n                        <mml:mi>f<\/mml:mi>\n                        <mml:mo>(<\/mml:mo>\n                        <mml:mi>x<\/mml:mi>\n                        <mml:mo>-<\/mml:mo>\n                        <mml:mi>y<\/mml:mi>\n                        <mml:mo>,<\/mml:mo>\n                        <mml:mi>z<\/mml:mi>\n                        <mml:mo>-<\/mml:mo>\n                        <mml:mi>w<\/mml:mi>\n                        <mml:mo>)<\/mml:mo>\n                        <mml:mo>=<\/mml:mo>\n                        <mml:mn>2<\/mml:mn>\n                        <mml:mi>f<\/mml:mi>\n                        <mml:mo>(<\/mml:mo>\n                        <mml:mi>x<\/mml:mi>\n                        <mml:mo>,<\/mml:mo>\n                        <mml:mi>z<\/mml:mi>\n                        <mml:mo>)<\/mml:mo>\n                        <mml:mo>+<\/mml:mo>\n                        <mml:mn>2<\/mml:mn>\n                        <mml:mi>f<\/mml:mi>\n                        <mml:mo>(<\/mml:mo>\n                        <mml:mi>y<\/mml:mi>\n                        <mml:mo>,<\/mml:mo>\n                        <mml:mi>w<\/mml:mi>\n                        <mml:mo>)<\/mml:mo>\n                      <\/mml:math>\n                    <\/jats:disp-formula>\n                    in non-Archimedean\n                    <jats:inline-formula>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        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