What is the formula to calculate loan payments?

P $=$ PV $*(1+$r$)$

The formula to calculate loan payments is P $=($r $*$ PV$)/(1-(1+$r$)),$ where P is the loan payment, r is the interest rate, PV is the present value of the loan, and $$ is the number of payment periods.

P $=($r $*$ PV$)*(1-(1+$r$))$

P $=$ r $*$ PV $*(1+$r$)$