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parametric plot(y = 2(\frac12\tanh t + \frac32-1)+1,x= \frac12\tanh t + \frac32), -100000<t<100000
parametric plot(y = 2(\frac12\tanh t + \frac32-1)+1,x= \frac12\tanh t + \frac32), -100000<t<100000
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