Сократить дробь 14x2y/7xy2 10x3-15ax2/21ax3-14x4
14x^2y/7xy^2 = 2x/y (10x^3-15ax^2)/(21ax^3-14x^4) = 5x^2(2x - 3a)/(-7x^3(2x-3a) = -5/7x