Simplify 7x+6x^2-5x+8x^3+3x-4x^2

$7 x + 6 x^{2} - 5 x + 8 x^{3} + 3 x - 4 x^{2}$

Subtract $5 x$ from $7 x$ .

$6 x^{2} + 2 x + 8 x^{3} + 3 x - 4 x^{2}$

Subtract $4 x^{2}$ from $6 x^{2}$ .

$2 x^{2} + 2 x + 8 x^{3} + 3 x$

Add $2 x$ and $3 x$ .

$2 x^{2} + 8 x^{3} + 5 x$

Reorder $2 x^{2}$ and $8 x^{3}$ .

$8 x^{3} + 2 x^{2} + 5 x$