Rút gọn các biểu thức sau
Rút gọn các biểu thức sau:
1, 3x+1/(x-1)^2 - 1/x+1 + x+3/1-x^2
2, 4x-2/1-x^2 - 2x-3/x+1 + 3x-1/(x-1)^2
3, 1/3x-2 - 1/3x+2 - 3x-6/4-9x^2
4, x^2+2/x^3 -1 + 2/ x^2+x+1 +1/1-x
5, 7/x - x/x+6 + 36/x^2+6x
6, x^3-1/ x^3 +x^2 +x - x^2-4/ 6y -3xy
7, A= 1/1-x +1/1+x +2/1+x^2 + 4/1+x^2 + 8/1+x^8
1, 3x+1/(x-1)^2 - 1/x+1 + x+3/1-x^2
2, 4x-2/1-x^2 - 2x-3/x+1 + 3x-1/(x-1)^2
3, 1/3x-2 - 1/3x+2 - 3x-6/4-9x^2
4, x^2+2/x^3 -1 + 2/ x^2+x+1 +1/1-x
5, 7/x - x/x+6 + 36/x^2+6x
6, x^3-1/ x^3 +x^2 +x - x^2-4/ 6y -3xy
7, A= 1/1-x +1/1+x +2/1+x^2 + 4/1+x^2 + 8/1+x^8