Решим группировкой
(3/4)* a * (2/3) * a^2 * (5/6) *a^3 = a*a^2*a^3 * 3/4 * 2/3 * 5/6 = a^6 * 30/72 = 5/12 a^6
(1/2) * x * (2/3) * x^3 * (3/5) * x^5 = x*x^3*x^5 * 6/30 = 1/5 * x^9 = 0,2 * x^9
(6/5)*a*(1/2)*a^2*(-5)*a^4 = a*a^2*a^4 * (-3) = -3 * a^7
(-3/2)*x^2*y^3*z * (4/3) * x * y^2 * z^3 = -2 * x^3 *y^5 * z^4
(5/4) * a^2 * b^2 * d * (2/5) * a^3 * b * c^3 = 0,5 * a^5 * b^3 * c^3 * d