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Author: hallo hello
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Compute Environment: Ubuntu 18.04 (Deprecated)
a=-2 b=-3 T(a,b)=2*a^2*b-2*a*b T(-2,-3) show(T)
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(a,b)  2a2b2ab\displaystyle \left( a, b \right) \ {\mapsto} \ 2 \, a^{2} b - 2 \, a b
def f(a, b): return 2*a^2*b-2*a*b f(-2,-3)
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f = lambda a, b: 2*a^2*b-2*a*b f(-2,-3)
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