First, let's expand the multiplication:
(3y^4 + 5)(5y^7 + 4) = 3y^4 * 5y^7 + 3y^4 * 4 + 5 * 5y^7 + 5 * 4
= 15y^11 + 12y^4 + 25y^7 + 20
Now, let's simplify by combining like terms:
= 15y^11 + 25y^7 + 12y^4 + 20
Therefore, the simplified form of (3y^4 + 5)(5y^7 + 4) is 15y^11 + 25y^7 + 12y^4 + 20.
Fully expand the multiplication and simplify
(3y^4+5)(5y^7+4)
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