23x^2y3xy-x^2 + y 2x^3y^2 - 23x^4y + 23x^2y^2 2x^3y^2 +
A.\(2{x^3}{y^2} - \frac{2}{3}{x^4}y + \frac{2}{3}{x^2}{y^2}\)
B.\(2{x^3}{y^2} + \frac{2}{3}{x^4}y + \frac{2}{3}{x^2}{y^2}\)
C.\(2{x^3}{y^2} - \frac{2}{3}{x^4}y - \frac{2}{3}{x^2}{y^2}\)
D.\(2{x^3}{y^2} + \frac{2}{3}{x^4}y - \frac{2}{3}{x^2}{y^2}\)

25xyx^2y-5x + 10y 25x^3y^2 + 2x^2y + 4xy^2 25x^3y^2 - 2
A.\(\frac{2}{5}{x^3}{y^2} + 2{x^2}y + 4x{y^2}\)
B.\(\frac{2}{5}{x^3}{y^2} - 2{x^2}y - 4x{y^2}\)
C.\(\frac{2}{5}{x^3}{y^2} - 2{x^2}y + 4x{y^2}\)
D.\(\frac{2}{5}{x^3}{y^2} + 2{x^2}y - 4x{y^2}\)

x-2yx^2y^2 - xy + 2y x^3y^2 - x^2y - 2x^2y^3 + 2xy + 2x
A.\({x^3}{y^2} - {x^2}y - 2{x^2}{y^3} + 2xy + 2x{y^2} - 4{y^2}\)
B.\({x^3}{y^2} + {x^2}y - 2{x^2}{y^3} + 2xy + 2x{y^2} - 4{y^2}\)
C.\({x^3}{y^2} - {x^2}y - 2{x^2}{y^3} + 2xy + 2x{y^2} + 4{y^2}\)
D.\({x^3}{y^2} - {x^2}y - 2{x^2}{y^3} + 2xy - 2x{y^2} - 4{y^2}\)

- 2x^3y2x^2-3y + 5yz - 4x^5y - 6x^3y^2 + 10x^3y^2z -
A.\( - 4{x^5}y - 6{x^3}{y^2} + 10{x^3}{y^2}z\)
B.\( - 4{x^4}y + 6{x^2}y - 10{x^2}yz\)
C.\( - 4{x^5}y + 6{x^3}{y^2} - 10{x^3}{y^2}z\)
D.\( - 4{x^5}y - 6{x^3}{y^2} - 10{x^3}{y^2}z\)

- 2x^3y2x^2-3y + 5yz - 4x^5y - 6x^3y^2 + 10x^3y^2z -
A.\( - 4{x^5}y - 6{x^3}{y^2} + 10{x^3}{y^2}z\)
B.\( - 4{x^4}y + 6{x^2}y - 10{x^2}yz\)
C.\( - 4{x^5}y + 6{x^3}{y^2} - 10{x^3}{y^2}z\)
D.\( - 4{x^5}y - 6{x^3}{y^2} - 10{x^3}{y^2}z\)

x^2 - 2x + 3x - 4 x^3 + 6x^2 - 11x + 12 x^3 + 6x^2 + 11
A.\({x^3} + 6{x^2} - 11x + 12\)
B.\({x^3} + 6{x^2} + 11x + 12\)
C.\({x^3} - 6{x^2} + 11x + 12\)
D.\({x^3} - 6{x^2} + 11x - 12\)

2x^3 - 3x - 15x + 2 10x^4 - 4x^3 - 15x^2 - 11x - 2 10x^
A.\(10{x^4} - 4{x^3} - 15{x^2} - 11x - 2\)
B.\(10{x^4} + 4{x^3} - 15{x^2} + 11x - 2\)
C.\(10{x^4} + 4{x^3} - 15{x^2} - 11x + 2\)
D.\(10{x^4} + 4{x^3} - 15{x^2} - 11x - 2\)

x + 1x^2-x + 1 x^3 + 1 x^3 - 1 x^3 - 2x^2 - 1 x^3 + 2x^
A.\({x^3} + 1\)
B.\({x^3} - 1\)
C.\({x^3} - 2{x^2} - 1\)
D.\({x^3} + 2{x^2} - 1\)

x + 3x^2 + 3x-5 x^3 - 6x^2 + 4x - 15 x^3 + 6x^2 + 4x -
A.\({x^3} - 6{x^2} + 4x - 15\)
B.\({x^3} + 6{x^2} + 4x - 15\)
C.\({x^3} + 6{x^2} + 4x + 15\)
D.\({x^3} + 6{x^2} - 4x + 15\)

Viết số thập phân 03 thành phân số thập phân 3100 310
A.\(\frac{3}{{100}}\)
B.\(\frac{3}{{10}}\)
C.\(\frac{3}{{1000}}\)
D.\(\frac{3}{{1000}}\)