取各數字與字符串 (12841)

A3=IFERROR(-LOOKUP(1,-RIGHT(MID(SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(A$1&"#課,","。",),"次","課,"),"課,",REPT(" ",99)),ROW(A1)*99-98,99),ROW($1:$99))),IF(A2="","",SUBSTITUTE(MID(A$1,FIND("。",A$1)+1,99),A2,)))