What is the units digit of the expression 14^7−15^4?	Pick:
A) 0  B) 8  C) 4  D) 6  E) 3
I think answer on this one should be B too. Since we know that 14^7&gt;15^4, as Will said one should always check if the number is positive.
<result>B</result>
What is the units digit of the expression 14^7−15^4?