What is the formula for yield to maturity?

Hi, I think I have found the yield to maturity formula :)

Please visit Investor + Blogger = Investoger?: Yield to Maturity

Thanks and good luck

yield to maturity is the total value or performance of the ( with coupon payments and capital gains or loss).
in other words the ytm of bond is the discounting rate, which equates the price of the bond with the par value of it's expected fututure cash flows.
vb=[int(I-i)/1+kd)n/kd] + [(m/(1+kd)n] and