Combine like terms to simplify the expression:
7x + 3y – 2 + 6x – 1 – y^2
–2y^3 + 13x – 3
–y^2 + 3y + 42x^2 –3
–3y^3 + 13x^2 – 3
–y^2 + 3y + 13x – 3
7x + 3y – 2 + 6x – 1 – y^2
–2y^3 + 13x – 3
–y^2 + 3y + 42x^2 –3
–3y^3 + 13x^2 – 3
–y^2 + 3y + 13x – 3