perform the indicated operation by removing the parentheses and combining like terms (3x^2+4x+3-(-4x^2-3)

To perform the operation, we need to remove the parentheses and combine like terms.

The given expression is: 3x^2 + 4x + 3 - (-4x^2 - 3)

Removing the parentheses, we get: 3x^2 + 4x + 3 + 4x^2 + 3

Combining like terms, we have: (3x^2 + 4x^2) + 4x + (3 + 3)

Simplifying further: 7x^2 + 4x + 6