Hi,
I think i know what you can do make different random statement for every equation in a for look, for example:
for math in range(1,equation+1)
yay = random.randrange(1,11)
yay2 = random.randrange(1,11)
yay3 = random.randrange(1,11)
print(yay,"(",yay2,"-",yay3,")")
I hope this makes sence!!!!