Question 379712
Okay, we can use the binomial theorem for this...
{{{(a-b)^14}}}=
{{{((14!)/(14!))*a^14 - ((14!)/(13!)(1!))*a^13*b + ((14!)/(12!)(2!))*a^12*b^2 - ((14!)/(11!)(3!))*a^11*b^3}}}
Now work out those coefficients and you're all set...