2. Find the product II

1. Multiply \((a + 7)\) and \((b – 5)\)
 
2. Multiply \((a^2+ 2b^2)\) and \((5a – 3b)\)
Answer variants:
\(ab – 5a + 7b + 35\)
\(ab – 5a + 7b – 35\)
\(5a^3-3a^2b+10ab^2-6b^3\)
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