What is the mathematical equation to equal 50 using each of the numbers 1 4 8 and 9 only once?

To equal 50 using the numbers 1, 4, 8, and 9 only once each, you can use the equation (9*4)+(8-1)=50. Here's the breakdown: first, multiply 9 by 4 to get 36. Then subtract 1 from 8 to get 7. Finally, add 36 and 7 together to get the desired result of 50.