(1.57*12/4.57 - 0.54* 12/1.54 )/(75 +10^3( 3*1.57/(3+1.57) + 1*0.54/(1.54)))

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.