Сauchy integral formula: "f(z_0) = \\frac{1}{2\\pi i}\\int_c \\frac{f(z)}{(z-z_0)}"
"\\int_c z^2 e^zdz = \\int_c \\frac{z^3e^z}{z}dz \\\\ f(z) = z^3 e^z, z_0 = 0"
So "\\int_cz^2e^z = 2\\pi i f(z_0) = 2\\pi i *0*e^0 = 0"
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