1) 6/(x+1)(x+2) + 8/(x-1)(x+4) = 1
2) x/(x-3) + 4/(x+3) = 18/(x^2-9)
3) 15 - (2x-4) - 3x/5 = 7x - x - 7/2 - 5x
4) x^6 - 19x^3 - 216 = 0
5) (x^4 - y^4)/(4x^2 - 2x + y - y^2) : (x^3 - x^2y + xy^2 - y^3)/(2x - y)
1) 6/(x+1)(x+2) + 8/(x-1)(x+4) = 1
2) x/(x-3) + 4/(x+3) = 18/(x^2-9)
3) 15 - (2x-4) - 3x/5 = 7x - x - 7/2 - 5x
4) x^6 - 19x^3 - 216 = 0
5) (x^4 - y^4)/(4x^2 - 2x + y - y^2) : (x^3 - x^2y + xy^2 - y^3)/(2x - y)