Rút gọn các biểu thức sau: x(x - 3) + x(1 - x); (2x - 5)(x + 3) - (x - 2)(3x + 1)

x(x - 3) + x(1 - x)
(2x - 5)(x + 3) - (x - 2)(3x + 1)
(x - 5)(x^2 + 26) + (x - 5)(5x - 1)
x(x - 3) - (x + 2)(x - 2) + 3x
(24x^4y^3 - 30x^5y^2 - 6x^6y^3) : 6x^4y^2
(4x + 5)^2 - 2(4x + 5)(x + 5) + (x + 5)^2
(x - 3)(x + 5) - x(x + 2)
(25x^6y^5 - 10x^5y^6 + 35x^5y^5) : 5x^5y^5
(x + y)^2 - (x - y)^2
- 10x^3y(2/3x^2y + 3/10xy^2) + 3x^4y^3
(x^2 - 2x - y^2 + 1) : (x - y - 1)
3x(4x - 3) - (x + 1)^2 - (11x^2 - 12)