№1
Выполните действия:

(10ab-8a)-(12ab+8a)
8c(12c^3-2c-6)

№4 НА ФОТО (необязательно)

№5
Реши уравнение:

[tex] \frac{5y}{8} - \frac{3y+6}{2} = \frac{5y-18}{6} [/tex]
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