Scientific Computing with Python Projects - Arithmetic Formatter

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Sorry to ask for help but, i am stuck. I have the correct output, but, i can not get it to pass the checker. I have redone the code many times. Any hints would be greatly appreciated.

``````def arithmetic_arranger(problems,sold = False):
topline, operator, bottomline, solved =  ([] for i in range(4))

if len(problems) > 5:
print('Error: To many problems.')
return

for i in problems:
p1,p2,p3 = i.split() # test split
#try:
#p1,p2,p3 = i.split()
#except ValueError:
#print('format error') # i added this, if no space between digits and operand
#return 'format error* test'

if len(p1)  > 4 or len(p3) >4:
return 'Error: Too many digits.'
elif p2 == "*" or p2 == "/":
return "Error: Operator must be '+' or '-'."
else:
try:
numb1,numb3 = int(p1),int(p3)
topline.append(p1)
operator.append(p2)
bottomline.append(p3)
if p2 == "+":
solved.append(str(int(p1)+int(p3)))
elif p2 =='-':
solved.append(str(int(p1)-int(p3)))
except ValueError:
return "Error: Numbers must only contain digits."

b = 0
bottom_test, bottom_dash, Top_new =  ([] for i in range(3))
for i in bottomline:
dash = 0
operator_test = operator[b]
if len(bottomline[b])< len(topline[b]):
dash =(len(topline[b])-len(bottomline[b]))+1
bottom_test.append((operator_test)+((' ')*dash)+(i))
bottom_dash.append(("-")*len(bottom_test[b]))
Top_new.append(("  ")+topline[b])
dash = len(bottom_dash[b])-len(solved[b])
solved[b]=(" "*dash)+solved[b]

elif len(bottomline[b]) == len(topline[b]):
dash = 1
bottom_test.append((operator_test)+((' ')*dash)+(i))
bottom_dash.append(("-")*len(bottom_test[b]))
Top_new.append(("  "*dash)+topline[b])
dash = len(bottom_dash[b])-len(solved[b])
solved[b]=(" "*dash)+solved[b]
else:#bottom > top
dash = 1 # changing to bottom
bottom_test.append((operator_test)+((' ')*dash)+(i))
bottom_dash.append(("-")*len(bottom_test[b]))
dash =len(bottom_test[b])-len(topline[b])
Top_new.append((" ")*dash +topline[b])
dash = len(bottom_dash[b])-len(solved[b])
solved[b]=(" "*dash)+solved[b]
b += 1

def calc(probs):
ind_x = 1
line = ""
for prob in probs:
if ind_x <len(prob):
line = str(line +str( prob + "    "))
else:
line = str(line + str(prob))
ind_x = ind_x + 1
return line
top_line =calc(Top_new)
bot_line = calc(bottom_test)
dash = calc(bottom_dash)
solved_true =calc(solved)

if sold:
return (f"{top_line}\n{bot_line}\n{dash}\n{solved_true}")
else:
return (f"{top_line}\n{bot_line}\n{dash}")
``````

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