問(もん)題(だい) mondaiを oこのまま konomamaに niして shiteおいて oiteは waいけない ikenai。 We can't leave the problem like this. Literal Problem [obj-を] this-way keep-[ておいては]-[prohibition-いけない]. このまま ('like this, as it is now') is the proximal demonstrative of まま, parallel to そのまま, あのまま. ておく contracted with ては + いけない gives the prohibition 'must not leave (it) like this.' problem-solving~てはいけない (must not)~ておく (do in advance)
問(もん)題(だい) mondaiを oこのまま konomamaに niして shiteおいて oiteは waいけない ikenai。 We can't leave the problem like this. Literal Problem [obj-を] this-way keep-[ておいては]-[prohibition-いけない]. このまま ('like this, as it is now') is the proximal demonstrative of まま, parallel to そのまま, あのまま. ておく contracted with ては + いけない gives the prohibition 'must not leave (it) like this.' problem-solving~てはいけない (must not)~ておく (do in advance)