paying off 100,000 mortgage at 7.5% interest in 5 years! what are the monthly payments?

pmt = Principal { r/[1 - (1+r)^-n ] }

r = interest per period = .075/12 = .00625
n = 12 * 5 = 60 periods
pmt = 10^5 {.00625/[1-(1.00625)^-60]}
= 10^5 (.0200379)
= $2,003.79