数字3を4個含む数式（４）を作成する問題の解答例を示します。
問題の解
[ 1] (3*3!+3!)/3!
[ 2] 3!-3+3/3
[ 3] (3!-3)/.3-3!
[ 4] 3+(3+3)/3!
[ 5] 3/.3-3-3
[ 6] (3*3!-3!)*α
[ 7] 3*(α+3/3)
[ 8] (3*3+3)*α
[ 9] 3+.3*(3+α)
[10] (3+3/α)/3
[11] (3+3+3!)*α
[12] 3+3-α*3!
[13] 3+(3!-3)*α
[14] 3!-3*(α+α)
[15] (3/α+3)*α
[16] (3/3+α)/α
[17] (3*α+α)/α
[18] 3+α+α+α
