To simplify the expression (-18) - 53 + 12 - 9 + 44 + 13, we first add and subtract the numbers from left to right:
(-18) - 53 + 12 - 9 + 44 + 13 = -71 + 12 - 9 + 44 + 13
= (-71 + 12) + (-9 + 44) + 13
= -59 + 35 + 13
= -24 + 13
= -11
Simplify: (-18) - 53 + 12 - 9 + 44 + 13
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