What is a polynomial function in standard form with zeroes 1,2,-3, and - 1

A polynomial function with roots r1, r2, r3, r4 is factoed as

(x-r1) (x-r2) (x-r3) (x-r4)

given

r1=1

r2=2

r3=-3

r4=-1

f (x) = (x-1) (x-2) (x - (-3)) (x - (-1))

f (x) = (x-1) (x-2) (x+3) (x+1)

do math yourself

f (x) = x⁴+x³-7x²-x+6