Hello! And thank you for your question!
Because there are so many steps. I will just write out the equations.
7y^5(6y^2−3y^3+5)
7y^5×6y^2+7y^5×−3y^3+7y^5×5
(7×6)y^5y^2+7y^5×−3y^3+7y^5×5
42y^5y^2+7y^5×−3y^3+7y^5×5
42y^5+2+7y^5×−3y^3+7y^5×5
42y^7+7y^5×−3y^3+7y^5×5
42y^7+(7×−3)y^5y^3+7y^5×5
42y^7−21y^5y^3+7y^5×5
42y^7−21y^5+3+7y^5×5
42y^7−21y^8+7y^5×5
42y^7−21y^8+35y^5
Final Answer:
42y⁷−21y⁸+35y⁵