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Evaluate the integral: int x³ √(x²+8)dx
1) 128 √(-( √(2(8+x²)(8+x²)))/(96)+( √(2(8+x²))(8+x²)²)/(1280))+C
2) 128 √(-( √(2(8+x²)(8+x²)))/(96)+( √(2(8+x²))(8+x²)²)/(1280))-C
3) 128 √(-( √(2(8+x²)(8+x²)))/(96)+( √(2(8+x²))(8+x²)²)/(1280))+D
4) 128 √(-( √(2(8+x²)(8+x²)))/(96)+( √(2(8+x²))(8+x²)²)/(1280))-D



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