-1 + 8*2.718281828459 ^( - 0.766179854162 ) = 2.718281828459 - Subtraction of 4.233820145838 and 5
-1 + 8 * 0.464785228557 = 2.718281828459 - Solving e^ - 0.766179854162
- 1+ 3.718281828459 = 2.718281828459 - Multiplication of 0.464785228557 and 8
2.718281828459 = 2.718281828459 - Addition
It checks and equals
I hope this helps .