Simplify (7x^5-4x^4+3x^2-5)+(-4x^4-2x^2-x+1)

$(7 x^{5} - 4 x^{4} + 3 x^{2} - 5) + (- 4 x^{4} - 2 x^{2} - x + 1)$

Remove parentheses.

$7 x^{5} - 4 x^{4} + 3 x^{2} - 5 - 4 x^{4} - 2 x^{2} - x + 1$

Subtract $4 x^{4}$ from $- 4 x^{4}$ .

$7 x^{5} - 8 x^{4} + 3 x^{2} - 5 - 2 x^{2} - x + 1$

Subtract $2 x^{2}$ from $3 x^{2}$ .

$7 x^{5} - 8 x^{4} + x^{2} - 5 - x + 1$

Add $- 5$ and $1$ .

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