Q.The coefficient of $x^{15}$ in the expansion of $(1 + x)(1 + x^2)(1 + x^4)\cdots(1 + x^{128})$ is

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Q.The coefficient of x15x^{15}x15 in the expansion of (1+x)(1+x2)(1+x4)⋯(1+x128)(1 + x)(1 + x^2)(1 + x^4)\cdots(1 + x^{128})(1+x)(1+x2)(1+x4)⋯(1+x128) is