Answer:
8x^2 + 5y + 1
Explanation:
1 + x^2 - 3 + 2y + 7x^2 + 3 + 3y
group like terms
= x^2 + 7x^2 + 2y + 3y + 1 - 3 + 3
add similar items
= 8x^2 + 2y + 3y + 1 - 3 + 3
= 8x^2 + 5y + 1 - 3 + 3
= 8x^2 + 5y + 1
8x^2+5y+1
1+x^2-3+2y+7x^2+3+3y
Combine like terms
x^2+7x^2+2y+3y+3+1-3
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