Промежуточные таблицы истинности:
¬C:

¬D:

A∨(¬C):

(A∨(¬C))∨(¬D):

B∨C:

¬(B∨C):

(¬(B∨C))∨(¬D):

¬((¬(B∨C))∨(¬D)):

((A∨(¬C))∨(¬D))∧A:

(((A∨(¬C))∨(¬D))∧A)∧D:

((((A∨(¬C))∨(¬D))∧A)∧D)∨(¬((¬(B∨C))∨(¬D))):

¬(((((A∨(¬C))∨(¬D))∧A)∧D)∨(¬((¬(B∨C))∨(¬D)))):

Общая таблица истинности:

Логическая схема:

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Совершенная дизъюнктивная нормальная форма (СДНФ):

По таблице истинности:
F_сднф = ¬A∧¬C∧¬D∧¬B ∨ ¬A∧¬C∧¬D∧B ∨ ¬A∧¬C∧D∧¬B ∨ ¬A∧C∧¬D∧¬B ∨ ¬A∧C∧¬D∧B ∨ A∧¬C∧¬D∧¬B ∨ A∧¬C∧¬D∧B ∨ A∧C∧¬D∧¬B ∨ A∧C∧¬D∧B
Логическая cхема:

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Совершенная конъюнктивная нормальная форма (СКНФ):

По таблице истинности:
F_скнф = (A∨C∨¬D∨¬B) ∧ (A∨¬C∨¬D∨B) ∧ (A∨¬C∨¬D∨¬B) ∧ (¬A∨C∨¬D∨B) ∧ (¬A∨C∨¬D∨¬B) ∧ (¬A∨¬C∨¬D∨B) ∧ (¬A∨¬C∨¬D∨¬B)
Логическая cхема:

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Построение полинома Жегалкина:

По таблице истинности функции
Построим полином Жегалкина:
F_ж = C₀₀₀₀ ⊕ C₁₀₀₀∧A ⊕ C₀₁₀₀∧C ⊕ C₀₀₁₀∧D ⊕ C₀₀₀₁∧B ⊕ C₁₁₀₀∧A∧C ⊕ C₁₀₁₀∧A∧D ⊕ C₁₀₀₁∧A∧B ⊕ C₀₁₁₀∧C∧D ⊕ C₀₁₀₁∧C∧B ⊕ C₀₀₁₁∧D∧B ⊕ C₁₁₁₀∧A∧C∧D ⊕ C₁₁₀₁∧A∧C∧B ⊕ C₁₀₁₁∧A∧D∧B ⊕ C₀₁₁₁∧C∧D∧B ⊕ C₁₁₁₁∧A∧C∧D∧B

Так как F_ж(0000) = 1, то С₀₀₀₀ = 1.

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

Таким образом, полином Жегалкина будет равен:
F_ж = 1 ⊕ A∧D ⊕ C∧D ⊕ D∧B ⊕ A∧C∧D ⊕ A∧D∧B ⊕ C∧D∧B ⊕ A∧C∧D∧B
Логическая схема, соответствующая полиному Жегалкина: