plot {4*sin(x)/x/(cos(x)+cosh(x))*cos(x)^4 + 4*sin(x)/x/(cos(x)+cosh(x))*sin(x)^4}, x = 0 .. 4*piplot {4*sin(x)/x/(cos(x)+cosh(x))*cos(x)^4 + 4*sin(x)/x/(cos(x)+cosh(x))*sin(x)^4}, x = 0 .. 4*pi

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