1) stay inside ->the mother told her children............................................
2) don't stay up late-> they asked me.......................................................
3) keep silent please-> he told his boy............................................
4) please don't talk in class-> we asked them.......................................
5) switch of the TV he said to her-> he asked ker..............................
6) shut the door tom she said-> she told tom.........................
7) please fill up this form the secretary said-> the secretary told me........................... 

I) change into reported  speech 
1 he said, im go bo school by bicycle 
->he said............................................
 

a) (1 phần 2 a³b² -3 phần 4 a b⁴ ). (4 phần 3a³b)
b) (-5). (3x³+7x²-x)

a) (4x²- 3y).2y- (3x²-4y).3y
b) 4x².(5x-3y)-x²(4x+y)
c) 10. (3x-2)-3(5x+2)+5(11-4x)