помогите решить пример    х-у+3х-2у-4х

Помогите найти значение выражения: НОК(8; 14; 56) + НОД (56;57)

Ask questions to the following sentences.

1. I go to school every day (Who?)

2. We went to Moscow yesterday (Where?)

3. They will pass exams in June (When?)

4. My mother has been cooking since morning (How long?)

5, I study English because it is an international language (Why?)

6. I am from Ukraine (Where?)

7. He has got two cats (How many?)

8. Sasha plays the piano well (How?)

9. We have written a dictation three times (How many?)

пищевая цепь лиса( что она жрёт)