Update app.py

app.py

@@ -30,7 +30,7 @@ def generate_equation():
         AExpression = expand(init_problem)
 
         a, b = [random.randint(min_value, max_value) for _ in range(2)]
-        Secondarial_init_problem = f"{a} + {b}"
+        Secondarial_init_problem = f"{a} - {b}*x"
         sAExpression = expand(Secondarial_init_problem)
 
     return AExpression, sAExpression
@@ -43,7 +43,7 @@ def generate_problem():
         expression = expand(f"(x + {a})*(x + {b})")
     elif selected_function == "方程式":
         AExpression, sAExpression = generate_equation()
-        expression = Eq(AExpression, sAExpression) if sAExpression else AExpression + b
+        expression = Eq(AExpression, sAExpression) if sAExpression else Eq(AExpression, b)
 
     return expression