Подстановка условия
[src]((b^(1/12)/a^(9/2))/a^(-19/4))*b^(1/3) при a = -2
((b^(1/12)/a^(9/2))/a^(-19/4))*b^(1/3)
$$\sqrt[3]{b} \frac{\frac{1}{a^{\frac{9}{2}}} \sqrt[12]{b}}{\frac{1}{a^{\frac{19}{4}}}}$$
((b^(1/12)/(-2)^(9/2))/(-2)^(-19/4))*b^(1/3)
$$\sqrt[3]{b} \frac{\frac{1}{(-2)^{\frac{9}{2}}} \sqrt[12]{b}}{\frac{1}{(-2)^{\frac{19}{4}}}}$$
((b^(1/12)/(-2)^(9/2))/(-2)^(-19/4))*b^(1/3)
$$\sqrt[3]{b} \frac{\frac{1}{16 \sqrt{2} i} \sqrt[12]{b}}{\frac{1}{16 \left(-2\right)^{\frac{3}{4}}}}$$
$$\sqrt[4]{-2} b^{\frac{5}{12}}$$