Solution
$$C_0^4 = 1$$
$$C_1^4 = 4$$
$$C_2^4 = 6$$
$$C_3^4 = 4$$
$$C_4^4 = 1$$
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$$C_0^4 = 1$$
$$C_1^4 = 4$$
$$C_2^4 = 6$$
$$C_3^4 = 4$$
$$C_4^4 = 1$$
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