Simplify -4x^3+3-3-3x^3+4+4x^3+2y^2

$- 4 x^{3} + 3 - 3 - 3 x^{3} + 4 + 4 x^{3} + 2 y^{2}$

Combine the opposite terms in $- 4 x^{3} + 3 - 3 - 3 x^{3} + 4 + 4 x^{3} + 2 y^{2}$ .

Subtract $3$ from $3$ .

$- 4 x^{3} + 0 - 3 x^{3} + 4 + 4 x^{3} + 2 y^{2}$

Add $- 4 x^{3}$ and $0$ .

$- 4 x^{3} - 3 x^{3} + 4 + 4 x^{3} + 2 y^{2}$

Add $- 4 x^{3}$ and $4 x^{3}$ .

$- 3 x^{3} + 4 + 0 + 2 y^{2}$

Add $- 3 x^{3} + 4$ and $0$ .

$- 3 x^{3} + 4 + 2 y^{2}$

Move $4$ .

$- 3 x^{3} + 2 y^{2} + 4$