number function

[Richard]

This is correctly displaying 15

$c=(1+2)*sqrt(25)
$a= number($c)
MsgBox(0, 'Testing', $a )

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And this is correctly displaying 0

$c="(1+2)*sqrt(25)"
$a= number($c)
MsgBox(0, 'Testing', $a )

How can one make a string evaluate with the number function?

I you enter the formula in an inputbox for example it will be a string.

So is there a way to remove the "" from the second example and make it give the

[Jos]

$c="(1+2)*sqrt(25)"
$a= number(execute($c))
MsgBox(0, 'Testing', $a )

[Richard]

The conversions should happen automatically. For Example:

$Val="20"*"2"
MsgBox(0,"",$Val)

I want the complete formula as 1 string, not only the numbers