What is 9 to the 2nd power plus -7 to the 3rd power plus -6 to the 2nd power x 5

About 26.03%

Press 2nd CLRTVM to clear,
2nd P/Y 1 ENTER 2nd Quit to set one payment/compound per year,
73 N for the number of years,
. 1 +/- PV for the original value,
2 1 6 1 0 0 0 FV for the last value,
CPT I/Y for the growth rate.

Alternatively, press
2 1 6 1 0 0 0 / . 0 1 = LN / 7 3 = 2nd e^x - 1 =

You're missing a parentheses.

If you mean e^(ln(177/149)/7)*26 then press
2ND [e^x] ( LN ( 1 7 7 / 1 4 9 ) / 7 ) right-arrow * 2 6 ENTER
if you're in the MATHPRINT mode. In the CLASSIC mode press
2ND [e^x] LN 1 7 7 / 1 4 9 ) / 7 ) * 2 6 ENTER

If you mean 6 plus cube root of 2 then press
6 + 2 2nd [cube-root] =

The cube root is the shifted function of the 0 key.

Error 6 indicated an invalid date, such as a month greater than 12 or a day greater than 31.

The calculator has two different formats for dates: DD-MM-YYYY and MM-DD-YYYY. To see the current format, press 2nd [FORMAT] down-arrow down-arrow. To change the format, press 2nd [SET]. Press 2nd [QUIT] to exit.

If the interest is compounded monthly:

2nd [CLR TVM] (clear any existing results)
1 5 0 0 0 _/- PV (present value, negative because you're paying it out)
6 I/Y (annual interest rate)
25 2nd [*P/Y] N (25 years)
CPT FV (compute future value, see 66,974.55)

If the interest is compounded annually:

2nd [CLR TVM] (clear any existing results)
1 5 0 0 0 _/- PV (present value, negative because you're paying it out)
6 I/Y (annual interest rate)
2nd [P/Y] 1 ENTER 2nd [QUIT] (one compounding period per year)
25 N (25 years)
CPT FV (compute future value, see 64,378.96)

2nd [FORMAT] 6 ENTER 2nd [QUIT].

The calculator has 10 memories (0 to 9)
To store a number (13) in memory 6 type 13 [STO] 6
To erase the content of memory 6 (M6) store 0 in int: 0 [STO] 6
To recall the content of memory location M7 press [RCL]7

To operate on the content of memory location M5 the syntax is [STO] [Op] 5, where [Op] is the operation symbol [+], [-],[x], [/] [y^x]

Ex: to raise the content of memory location 4 to the power of the displayed value, you press [STO][Y^x] 4

To clear all 10 memory locations
press [2nd][MEM][2nd][CLR WORK]

In short, although you do not have the keys you are accustomed to, you have a lot more. And please do not blame me if you feel disappointed.

5 0 0 0 2ND [e^x] . 9 6 ENTER

computes 5000 e^.96

If you want (5000e)^.96 then it's

( 5 0 0 0 2ND [e^x] 1 ) ^ . 9 6

e^x is just to the left of the 4 key.

1. Press [2nd][0] to access the (CATALOG).
2. While catalog of commands is displayed you can scroll gown to reach ClrAllLists.
   
3. Alternatively, you press [PRGM] to jump to first command that starts wit C, then scroll down from there.
4. Select command and press [ENTER].
   
5. The ClrAllList commnad echoes on main screen.
   
6. Press ENTER to execute command.
   
7. Calculator answers Done.
   

A simpler way. Press [2nd][MEM][4:ClrAllLists] then press [ENTER]

Another more radical way is to reset the RAM. Press [2nd][MEM][7:Reset][1:All Ram][2:Reset][ENTER]. Calculator replies with Ram Cleared. Press [CLEAR] to erase the message.

To clear a single list:

Open the statistics data editor [STAT][EDIT]. Navigate to the list you want to clear. Press the Up arror to move cursor to the heading of the list and press [CLEAR] and validate by pressing ENTER.

Other way:

Press [STAT][4:ClrList]
Command echoes on main screen and you have to enter the name of the list. If it is one of the 6 accessible from the keyboard you press [2nd] [1, 2,3, 4,5, or 6] to enter L1, L2,L3,L4,L5 or L6.

The problem is that L1 has been archived. Just unachive it.
2nd, mem, 6, then type: 2nd, 1, enter.

This will unachived it but you will probably have to reset as well.
2nd, mem, 7, 1, 2.

This will fix it. On the previous email I thought the * meant that it was missing.
Good luck.
Mark