Help me in solving EVALMAS problem

help
,
1

My issue

Answer

My code

# cook your dish here
def expression(opp,val):
    if(val>opp+1 or val< -opp+1):
        return "-1"
    if val==1:
        return "*"*opp
    if val==0:
        return "-"+"*"*(opp-1)
    if val>1:
        mul=val-1
        return "+"*mul+"*"*(opp-mul)
        return
    if va<=-1:
        mul=-val+-1
        return "-"*mul+"*"*(opp-mul)
            
t=int(input())
for _ in range(t):
    operations,val=map(int,input().split())
    print(expression(operations,val))

Learning course: Design and Analysis of Algorithms
Problem Link: https://www.codechef.com/learn/course/kl-daa/KLDAA2400H/problems/EVALMAS