6) 3ab6 + 5b3ab3 - 25b6a 6) 45a12x8z: (-a7x10z)

6) 3ab⁶ + 5b³ab³ - 25b⁶a = 3ab⁶ + 5ab⁶ - 25ab⁶ = -17ab⁶

6) 45a¹²x⁸z ∶ (-5/9 a⁷x¹⁰z) = 45 ∶ (-5/9) ∙ a¹² ∶ a⁷ ∙ x⁸ ∶ x¹⁰ ∙ z ∶ z = 45 ∙ (-9/5) ∙ a⁵ ∙ x⁻² ∙ 1 = -81a⁵/x²

Ответ: 6) -17ab⁶; 6) -81a⁵/x²