Simplify 6x^3-3y^2-z+2x^2+3y^2-7z

$6 x^{3} - 3 y^{2} - z + 2 x^{2} + 3 y^{2} - 7 z$

Combine the opposite terms in $6 x^{3} - 3 y^{2} - z + 2 x^{2} + 3 y^{2} - 7 z$ .

Add $- 3 y^{2}$ and $3 y^{2}$ .

$6 x^{3} - z + 2 x^{2} + 0 - 7 z$

Add $6 x^{3} - z + 2 x^{2}$ and $0$ .

$6 x^{3} - z + 2 x^{2} - 7 z$

Subtract $7 z$ from $- z$ .

$6 x^{3} + 2 x^{2} - 8 z$