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a in (-oo:+oo)
1000000 = a+3000/40 // - a+3000/40
1000000-a-(3000/40) = 0
1000000-a-75 = 0
999925-a = 0 // - 999925
-a = -999925 // * -1
a = 999925
a = 999925
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