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81.17;9.62
10*x+4.5*y-249;10*w-(4.5*z)-153;y+z-48;w+x-12
e^(x^-1)
10*x+4.5*y-249;10*w-4.5*z-153;y+z-48;w+x-12
ln(x^4-x^2-1)
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