first page number: {{#var: varFirstPageNumber}}
{{#vardefineroman: varFirstPageNumberArabic|{{#tagroman: romannegative|{{#var: varFirstPageNumber}}}} |}} roman in negative arabic:{{#var: varFirstPageNumberArabic}} is numberromannegative: {{#tag: IsNumber|{{#tag: romannegative|{{#var: varFirstPageNumber}}}}}} Saving the page number{{#set:First_Page={{#var: varFirstPageNumberArabic}}|}}
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{{#vardefine: varFirstPageNumberArabicManual|-5467}}
manual: {{#var: varFirstPageNumberArabicManual}}
is number: {{#tag: IsNumber|{{#var: varFirstPageNumberArabicManual}}}}
{{#set:First Page={{#var: varFirstPageNumberArabicManual}}|}}
roman negative: {{#tag: romannegative|234}}