Как доказать что 7n-63 кратно числу 7 при любом значении n?

Докажите, что при любом значении а верно неравенство:

1) 3(а+1)+а-4(2+а)<0

2)(а-2)в квадрате -а(а-4)>0

3)1+2а в четвертой меньше или равно а в квадрате+ 2а

 «Match and make word combinations.

to wake ---------- up

to fall           ill

to take          a sore throat

to have         well

to get            the temperature

Complete the sentences with the word combinations. Mind the tenses.

The girl usually ------------- early in the morning.

Sorry, but I cant sing at the concert today. I --------------------

The doctor ------ and gave a prescription Soon my brother -------------- and took part in the football match.

After the walk the scientist -------------- and sent for the doctor