Помогите упростить выражение! 1) 9x^3y^3/65m^7 * 39x^4m^3/40y^5 * 16y^2m^4/27x^7=. 2) 52a^5/84b^10 : 39 а/102b^2 : 4a^3/45b^9=

1)) 1) 9 х^3y^3/65m^7 * 39x^4m^3/40y^5 = 9x^3/5m^4 * 3x^4/40y^2 = 27x^7/200y^2m^4;

2) 27x^7/200y^2m^4 * 16y^2m^4/27x^7 = 2/5;

Ответ: 2/5.

2)) 1) 52a^4/63b^8 : 39a/10b^2 = 52a^4/63b^8 * 10b^2/39a = 4a^4/42b^8 * 5/3 = 2a^4/21b^8 * 5/3 = 10a^4/63b^8;

2) 10a^4/63b^8 : 4a^3/45b^9 = 10a^4/63b^8 * 45b^9/4a^3 = 5a/7 * 5b/2 = 25ab/14 = 1 11ab/14.

Ответ: 1 11ab/14.