Simplify (11+3x^3)+(4x^2-2)+3x

$(11 + 3 x^{3}) + (4 x^{2} - 2) + 3 x$

Remove parentheses.

$11 + 3 x^{3} + 4 x^{2} - 2 + 3 x$

Subtract $2$ from $11$ .

$3 x^{3} + 4 x^{2} + 9 + 3 x$

Move $9$ .

$3 x^{3} + 4 x^{2} + 3 x + 9$