1. Evaluate :
(a) (-40) 45
(b) (-450) + (3+6)
(c) (-36) + (12 + 0)
(d) (- 50) + 50
(e) 420 + 10 + (-8)}
(6 - 46)+((-40) + (-61
(g) {(-48) + 12} + 2
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