Pre-Algebra Examples

$(82 x^{8} + 21 x^{2} - 6) + (18 x + 7 x^{8} - 42 x^{2} + 3)$

Step 1

Remove parentheses.

$82 x^{8} + 21 x^{2} - 6 + 18 x + 7 x^{8} - 42 x^{2} + 3$

Step 2

Add $82 x^{8}$ and $7 x^{8}$ .

$89 x^{8} + 21 x^{2} - 6 + 18 x - 42 x^{2} + 3$

Step 3

Subtract $42 x^{2}$ from $21 x^{2}$ .

$89 x^{8} - 21 x^{2} - 6 + 18 x + 3$

Step 4

Add $- 6$ and $3$ .

$89 x^{8} - 21 x^{2} + 18 x - 3$