Решите пожалуйста!!!!! найти производную функции:

 y=2x^3-x^2/2+4

y=2cosx-3tgx

y=x-3/x+2

Найдите значение а, если:

1)  -а= - (0,75 - 5/12)

2)  -а= 1 7/8 * (5 8/15 + 2 1/3)

запиши множество значений переменной, при которых неравенство истинно: 360:а<4

Помогите , срочно надо !!! 1. Розкажіть про свій день за допомогою таких питань . 1;.Are you a student? Where do you study ? 2. What do you usually do in the morning? ' 3. What do you think about morning exercises? Do we need to do them regularly? 4. When do your classes begin? 5. What do you do at the college? 6. What is more interesting for you: to listen to a lecture or to be present at practical classes? 7. What subjects do you like? Why? 8. What do you usually do after classes? 9. How do you prefer to spend your evening? 10. What do you hate doing? 11. What time do you usually go to bed?

Можете написать рассказ о друге и подруге НА ФРАНЦУЗСКОМ!!! СРОЧНО!!!