Промежуточные таблицы истинности:
X1∧X2:

(X1∧X2)∧X3:

(X1∧X2)∨X3:

F∧((X1∧X2)∧X3):

((X1∧X2)∨X3)→X2:

(F∧((X1∧X2)∧X3))≡(((X1∧X2)∨X3)→X2):

Общая таблица истинности:

Логическая схема:

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Совершенная дизъюнктивная нормальная форма (СДНФ):

По таблице истинности:
F_сднф = ¬F∧¬X1∧¬X2∧X3 ∨ ¬F∧X1∧¬X2∧X3 ∨ F∧¬X1∧¬X2∧X3 ∨ F∧X1∧¬X2∧X3 ∨ F∧X1∧X2∧X3
Логическая cхема:

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Совершенная конъюнктивная нормальная форма (СКНФ):

По таблице истинности:
F_скнф = (F∨X1∨X2∨X3) ∧ (F∨X1∨¬X2∨X3) ∧ (F∨X1∨¬X2∨¬X3) ∧ (F∨¬X1∨X2∨X3) ∧ (F∨¬X1∨¬X2∨X3) ∧ (F∨¬X1∨¬X2∨¬X3) ∧ (¬F∨X1∨X2∨X3) ∧ (¬F∨X1∨¬X2∨X3) ∧ (¬F∨X1∨¬X2∨¬X3) ∧ (¬F∨¬X1∨X2∨X3) ∧ (¬F∨¬X1∨¬X2∨X3)
Логическая cхема:

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Построение полинома Жегалкина:

По таблице истинности функции
Построим полином Жегалкина:
F_ж = C₀₀₀₀ ⊕ C₁₀₀₀∧F ⊕ C₀₁₀₀∧X1 ⊕ C₀₀₁₀∧X2 ⊕ C₀₀₀₁∧X3 ⊕ C₁₁₀₀∧F∧X1 ⊕ C₁₀₁₀∧F∧X2 ⊕ C₁₀₀₁∧F∧X3 ⊕ C₀₁₁₀∧X1∧X2 ⊕ C₀₁₀₁∧X1∧X3 ⊕ C₀₀₁₁∧X2∧X3 ⊕ C₁₁₁₀∧F∧X1∧X2 ⊕ C₁₁₀₁∧F∧X1∧X3 ⊕ C₁₀₁₁∧F∧X2∧X3 ⊕ C₀₁₁₁∧X1∧X2∧X3 ⊕ C₁₁₁₁∧F∧X1∧X2∧X3

Так как F_ж(0000) = 0, то С₀₀₀₀ = 0.

Далее подставляем все остальные наборы в порядке возрастания числа единиц, подставляя вновь полученные значения в следующие формулы:
F_ж(1000) = С₀₀₀₀ ⊕ С₁₀₀₀ = 0 => С₁₀₀₀ = 0 ⊕ 0 = 0
F_ж(0100) = С₀₀₀₀ ⊕ С₀₁₀₀ = 0 => С₀₁₀₀ = 0 ⊕ 0 = 0
F_ж(0010) = С₀₀₀₀ ⊕ С₀₀₁₀ = 0 => С₀₀₁₀ = 0 ⊕ 0 = 0
F_ж(0001) = С₀₀₀₀ ⊕ С₀₀₀₁ = 1 => С₀₀₀₁ = 0 ⊕ 1 = 1
F_ж(1100) = С₀₀₀₀ ⊕ С₁₀₀₀ ⊕ С₀₁₀₀ ⊕ С₁₁₀₀ = 0 => С₁₁₀₀ = 0 ⊕ 0 ⊕ 0 ⊕ 0 = 0
F_ж(1010) = С₀₀₀₀ ⊕ С₁₀₀₀ ⊕ С₀₀₁₀ ⊕ С₁₀₁₀ = 0 => С₁₀₁₀ = 0 ⊕ 0 ⊕ 0 ⊕ 0 = 0
F_ж(1001) = С₀₀₀₀ ⊕ С₁₀₀₀ ⊕ С₀₀₀₁ ⊕ С₁₀₀₁ = 1 => С₁₀₀₁ = 0 ⊕ 0 ⊕ 1 ⊕ 1 = 0
F_ж(0110) = С₀₀₀₀ ⊕ С₀₁₀₀ ⊕ С₀₀₁₀ ⊕ С₀₁₁₀ = 0 => С₀₁₁₀ = 0 ⊕ 0 ⊕ 0 ⊕ 0 = 0
F_ж(0101) = С₀₀₀₀ ⊕ С₀₁₀₀ ⊕ С₀₀₀₁ ⊕ С₀₁₀₁ = 1 => С₀₁₀₁ = 0 ⊕ 0 ⊕ 1 ⊕ 1 = 0
F_ж(0011) = С₀₀₀₀ ⊕ С₀₀₁₀ ⊕ С₀₀₀₁ ⊕ С₀₀₁₁ = 0 => С₀₀₁₁ = 0 ⊕ 0 ⊕ 1 ⊕ 0 = 1
F_ж(1110) = С₀₀₀₀ ⊕ С₁₀₀₀ ⊕ С₀₁₀₀ ⊕ С₀₀₁₀ ⊕ С₁₁₀₀ ⊕ С₁₀₁₀ ⊕ С₀₁₁₀ ⊕ С₁₁₁₀ = 0 => С₁₁₁₀ = 0 ⊕ 0 ⊕ 0 ⊕ 0 ⊕ 0 ⊕ 0 ⊕ 0 ⊕ 0 = 0
F_ж(1101) = С₀₀₀₀ ⊕ С₁₀₀₀ ⊕ С₀₁₀₀ ⊕ С₀₀₀₁ ⊕ С₁₁₀₀ ⊕ С₁₀₀₁ ⊕ С₀₁₀₁ ⊕ С₁₁₀₁ = 1 => С₁₁₀₁ = 0 ⊕ 0 ⊕ 0 ⊕ 1 ⊕ 0 ⊕ 0 ⊕ 0 ⊕ 1 = 0
F_ж(1011) = С₀₀₀₀ ⊕ С₁₀₀₀ ⊕ С₀₀₁₀ ⊕ С₀₀₀₁ ⊕ С₁₀₁₀ ⊕ С₁₀₀₁ ⊕ С₀₀₁₁ ⊕ С₁₀₁₁ = 0 => С₁₀₁₁ = 0 ⊕ 0 ⊕ 0 ⊕ 1 ⊕ 0 ⊕ 0 ⊕ 1 ⊕ 0 = 0
F_ж(0111) = С₀₀₀₀ ⊕ С₀₁₀₀ ⊕ С₀₀₁₀ ⊕ С₀₀₀₁ ⊕ С₀₁₁₀ ⊕ С₀₁₀₁ ⊕ С₀₀₁₁ ⊕ С₀₁₁₁ = 0 => С₀₁₁₁ = 0 ⊕ 0 ⊕ 0 ⊕ 1 ⊕ 0 ⊕ 0 ⊕ 1 ⊕ 0 = 0
F_ж(1111) = С₀₀₀₀ ⊕ С₁₀₀₀ ⊕ С₀₁₀₀ ⊕ С₀₀₁₀ ⊕ С₀₀₀₁ ⊕ С₁₁₀₀ ⊕ С₁₀₁₀ ⊕ С₁₀₀₁ ⊕ С₀₁₁₀ ⊕ С₀₁₀₁ ⊕ С₀₀₁₁ ⊕ С₁₁₁₀ ⊕ С₁₁₀₁ ⊕ С₁₀₁₁ ⊕ С₀₁₁₁ ⊕ С₁₁₁₁ = 1 => С₁₁₁₁ = 0 ⊕ 0 ⊕ 0 ⊕ 0 ⊕ 1 ⊕ 0 ⊕ 0 ⊕ 0 ⊕ 0 ⊕ 0 ⊕ 1 ⊕ 0 ⊕ 0 ⊕ 0 ⊕ 0 ⊕ 1 = 1

Таким образом, полином Жегалкина будет равен:
F_ж = X3 ⊕ X2∧X3 ⊕ F∧X1∧X2∧X3
Логическая схема, соответствующая полиному Жегалкина: