求帮忙解释一下

=IF(ISERROR(IF(OR($F7=23,AND($F7>=0,$F7<7)),IF($N7>=LARGE(IF(($F$2:$F$10768>=0)*($F$2:$F$10768<7)*($D$2:$D$10768=$D7),$N$2:$N$10768),IF(SUMPRODUCT(($F$2:$F$10768>=0)*($F$2:$F$10768<7)*($D$2:$D$10768=$D7))>=4,4,SUMPRODUCT(($F$2:$F$10768>=0)*($F$2:$F$10768<7)*($D$2:$D$10768=$D7)))),$N7,IF(F7=23,$N7,"")),"")),"",IF(OR($F7=23,AND($F7>=0,$F7<7)),IF($N7>=LARGE(IF(($F$2:$F$10768>=0)*($F$2:$F$10768<7)*($D$2:$D$10768=$D7),$N$2:$N$10768),IF(SUMPRODUCT(($F$2:$F$10768>=0)*($F$2:$F$10768<7)*($D$2:$D$10768=$D7))>=4,4,SUMPRODUCT(($F$2:$F$10768>=0)*($F$2:$F$10768<7)*($D$2:$D$10768=$D7)))),$N7,IF($F7=23,$N7,"")),""))
哪位大神可以帮忙解释一下什么意思，或者是帮我分一下段我自己根据分出来的结果再看也行。实在是看不下去了。。。