How to do better in solving constructive problems?

Правка en1, от realRainFestivalqwq, 2021-01-03 14:13:52

I always has difficulty in solving constructive problems.I usually think hard but I can't solve them.So how to solve them easily?Thanks a lot for your help.

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en3 Английский realRainFestivalqwq 2021-09-10 13:59:13 0 (published)
en2 Английский realRainFestivalqwq 2021-09-10 13:58:57 0 (saved to drafts)
en1 Английский realRainFestivalqwq 2021-01-03 14:13:52 206 Initial revision (published)