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Y in (-oo:+oo)
Y/4-1.3 = -77 // + 77
Y/4-1.3+77 = 0
1/4*Y+75.7 = 0 // - 75.7
1/4*Y = -75.7 // : 1/4
Y = -75.7/1/4
Y = -302.8
Y = -302.8
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