Simplify 8a^2+3a-1+2a-5a^2+3

$8 a^{2} + 3 a - 1 + 2 a - 5 a^{2} + 3$

Subtract $5 a^{2}$ from $8 a^{2}$ .

$3 a^{2} + 3 a - 1 + 2 a + 3$

Add $3 a$ and $2 a$ .

$3 a^{2} + 5 a - 1 + 3$

Add $- 1$ and $3$ .

$3 a^{2} + 5 a + 2$