((x^7 y^4)^3) / ((x^10 y^5)^2) = (x^21 y^12) / (x^20 y^10) = x^(21-20) y^(12-10) = x y^2
((3a^9 b^3)^2) / ((-4a^4 b)^4) = (9a^18 b^6) / (256a^16 b^4) = (9/256)a^(18-16) * b^(6-4) = (9/256)a^2 b^2
((7^2)^8 (6^3)^4) / ((7^4 6^3)^4) = (49^8 216^4) / (2401 216) = (117649 * 294912) / 518616 = 36665100288 / 518616 = 70752 = 1
((9^4 8^3)^5) / ((9^10)^2 (8^2)^7) = (6561 512)^5 / (3486784401 64^7) = (3359232)^5 / (3486784401 * 2097152) = 1208925819614629174706176 / 7315534281600 = 165013430020771201216.
Поэтому (9^4 * 8^3)^5 / (9^10)^2 / (8^2)^7 = 8.
((x^7 y^4)^3) / ((x^10 y^5)^2) = (x^21 y^12) / (x^20 y^10) = x^(21-20) y^(12-10) = x y^2
((3a^9 b^3)^2) / ((-4a^4 b)^4) = (9a^18 b^6) / (256a^16 b^4) = (9/256)a^(18-16) * b^(6-4) = (9/256)a^2 b^2
((7^2)^8 (6^3)^4) / ((7^4 6^3)^4) = (49^8 216^4) / (2401 216) = (117649 * 294912) / 518616 = 36665100288 / 518616 = 70752 = 1
((9^4 8^3)^5) / ((9^10)^2 (8^2)^7) = (6561 512)^5 / (3486784401 64^7) = (3359232)^5 / (3486784401 * 2097152) = 1208925819614629174706176 / 7315534281600 = 165013430020771201216.
Поэтому (9^4 * 8^3)^5 / (9^10)^2 / (8^2)^7 = 8.