Changes

‘? Set Variable’ (C) there select 'Expression' and select via the blue rectangle first 'A' then type '+' and next select 'B'. Finally the line reads {lv=A}+{lv=B}.

‘? Set Variable’ (C) there select 'Expression' and select via the blue rectangle first 'A' then type '+' and next select 'B'. Finally the line reads {lv=A}+{lv=B}.

To add 130 to C the command in the ‘Action Window’ should read as:                    

To add 130 to C the command in the ‘Action Window’ should read as:

C:{lv=C}+130 or C:{lv=C}+1.3E2 using scientific notation.     

C:{lv=C}+130 or C:{lv=C}+1.3E2 using scientific notation.     

C: ({lv=A}^{lv=B}+20)^0.5    With A=2, B=3 the  result is C=5.29

C: ({lv=A}^{lv=B}+20)^0.5    With A=2, B=3 the  result is C=5.29

In words square root of (A to the power of B plus 20)

In words square root of (A to the power of B plus 20)