раскройте скобки и приведите подобные слагаемые =) 4(7-5x)-(12-20x) 2(3x-y)-(5x-2y) 6(x+2y)-3(2x+y) 5(4x+y)-2(x-y)

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One day when Pooh Bear (1.visit) some of his friends and had nothing else to do, he (2. think) he (3. go) round ro Piglet's house (4. see) what Piglet (5.do). It (6. snow) since early morning. Pooh (7. expect) (8. find) Piglet (9.warm) his toes in front of his fire, but to ihs surprise he (10. see) that the door (11. be) open, and the more he (12. look) inside the morn Piglet (13. not, be) there. So what I (14. do), said Pooh, is this. I (15. go) home first and see what the time (16. be), and perhaps I (17. put) a scarf round my neck, and them I (18. go) and (19. see) Eeyore and (20.sing) my new hum to him. He (21. hurry) back to his own house; when he (22. open) his door he suddenly (23.see) Piglet (24. sit) in his best armchair and looking as if he (25. sit) there for a long time. Pooh could only (26.stand) there (27. wonder) whose house he (28. be) in. "Hallo, Piglet," he said. "I(29.think) you (30.be) out." "No," said Piglet, "it's you who (31. be) out. I (32. sit) here for an hour already

ПОМОГИТЕ ПЛИЗЗ!
Из формулы s = at( в квадрате) делённая на 2 -( это дробь)  выразиет переменную t (все велечины положительны) ???

подчеркнуть в предложении главные и второстепенны члены выписать словосочетания обозначить части речи яркое солнце освещает зелёные макушки берёзы