On nonoscillation of mixed advanced-delay differential equations with positive and negative coefficients

For a mixed (advanced-delay) differential equation with variable delays and coefficients ẋ(t)±a(t)x(g(t))∓b(t)x(h(t))=0,t≥t0 where a(t)≥0,b(t)≥0,g(t)≤t,h(t)≥t explicit nonoscillation conditions are obtained.