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We are concerned with the oscillation of the forced second-order neutral nonlinear differential equations with delayed argument in the form (r(t)(x(t)+a(t)x(σ(t)))′)′+p(t)f(x(τ(t)))+∑i=1nqi(t)|x(t)|λisngx(t)=e(t). No restriction is imposed on the potentials p(t), qi(t), ande(t) to be nonnegative. Our methodology is somewhat different from those of previous authors.