1. He would like some ice .......................

2. They like ....................... color so much. 3. The baby is ....................... 4. Doctors wear ....................... when working in hospital. 5. The queen has a gold ....................... 6. The car accident has ....................... the road. 7. The apricot is ....................... 8. The ice all over the lake has been ....................... 9. He has a ....................... mobile. 10. Youth ....................... is a serious problem today.

a)  A= 5x( 4x² - 2x + 1) - 2x(10x² - 5x - 2) với x= 15

b)  B= 5x(x-4y) - 4y( y - 5x ) với x=-1/5; y= -(1/2)

c)  C= 6xy ( xy - y² ) - 8x² ( x - y²) - 5y² ( x² - xy)  với x= 1/2; y=2

B=m(m-n+1)-n(n+1-m) với m=\(\dfrac{-2}{3}\),n=\(\dfrac{-1}{3}\)

Tính A=a²(a+b)-b(a²-b²)+2013 với a=1,b=-1

a=a^2(a+b)-b(a^2-b^2)+2013 với a=1 và b=-1

B=m(m-n+1)-n(n+1-m) với m=-2/3;n=-1/3