Triangle wave, function and graph

y=sin(2*pi*x)+1/9*sin(3*[2*pi*x])+1/25*sin(5*[2*pi*x])+1/49*sin(7*[2*pi*x])+1/81*sin(9*[2*pi*x])+1/121*sin(11*[2*pi*x])


Graph of the formula

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