Exemple:
- 5 − 8 = −3
- − 4 − 3 = −7
- − 7 + 2 = −5
- − 7 + 9 = 2
- − 5 − (−2) = −5 + 2 = −3
- − (a − b + c) = − a + b − c
- 3 * (−5) = − 15
- − 4 * (+2) = −8
- (−2) * (−3) = 6;
- 8 : (−4) = −2
- (−8) : (−1) = 8
- (−3)2 = 9
- (−3)3 = − 27
- (−1)7 = −1
- (−1)4 = 1
- 15 = 1
- 81 = 8
- (−7)1 = −7
- 30 = 1
- (−6)0 = 1
- 07 = 0
- 217 * 23 = 220
- 513 : 53 = 510
- (73)4 = 712
- (2n)3 = 8n3
- −3n * 2n3 = − 6n4
39. 2y − 9y = − 7y
40. − b + 2b = b
41. −3n2 − 5n2 = − 8n2
42. a + a = 2a
43. c * c = c2
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