Expression 3: StartFraction, Start product from "n" equals 1 to "a" , end product, left parenthesis, "x" minus "n" Subscript, "p" , Baseline left parenthesis, "n" , right parenthesis , right parenthesis Over "b" , EndFractiona∏n=1x−npnb
3
Expression 4: "a" equals 15a=15
4
Expression 5: "b" equals 10 to the 15th powerb=1015