Algebra Examples

$- - 2^{2}$

Step 1

Replace all occurrences of $-$ $-$ with a single $+$ . Two consecutive minus signs have the same mathematical meaning as a single plus sign because $- 1 \cdot - 1 = 1$

$2^{2}$

Step 2

Raise $2$ to the power of $2$ .

$4$