Simplify (4-8x^2+3x^4)+(2x+6x^4-7)

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

Simplify the expression.

Remove parentheses.

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

Subtract $7$ from $4$ .

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

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

Add $3 x^{4}$ and $6 x^{4}$ .

$- 8 x^{2} + 9 x^{4} + 2 x - 3$

Reorder $- 8 x^{2}$ and $9 x^{4}$ .

$9 x^{4} - 8 x^{2} + 2 x - 3$

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