Simplify (8a^5-4)+(3a^5+a-2)

$(8 a^{5} - 4) + (3 a^{5} + a - 2)$

Remove parentheses.

$8 a^{5} - 4 + 3 a^{5} + a - 2$

Add $8 a^{5}$ and $3 a^{5}$ .

$11 a^{5} - 4 + a - 2$

Subtract $2$ from $- 4$ .

$11 a^{5} + a - 6$