``python=
def input_equation():
valid = False
while not valid:
equation = input("請輸入方程式:")
equation = equation.replace(" ", "") # 移除空白

# 檢查方程式是否合法
match = re.match(r"\((\d*)x([\+\-]\d*)y\)\^(\d*)", equation)
if match:
valid = True
else:
print("")

return match.groups() # 回傳使用者輸入的數字

# Problem 1 solution
# problem solution write here
# you need use input_number funtion in your solution
def main():
a, b, c = input_equation()

# 構建方程式字串
equation = f"{int(a)**int(c)}*x^{c}+{2*int(a)*int(b)}*x*y+{int(b)**int(c)}*y^{c}"

print("展開式:", equation)

main()

執行結果:

部分測試成功