It seems like the text provided is not a standard mathematical expression or question. It includes symbols and characters that do not form a coherent mathematical operation or question as it stands. Let's break down the components:
$2+46!7:$ - The factorial symbol "!" is typically used in mathematics to denote the product of all positive integers up to a given number. However, "46!7" is not a standard expression. If it were meant to be "46!," it would be the factorial of 46, which is a very large number. The "7:" following it is unclear in its purpose.
$\times 10 \mathrm{mamoH}$ - The multiplication symbol "×" is clear, but "10 mamoH" is not a recognized mathematical term or unit. It might be a typographical error or a placeholder for something else.
$+40$ - This is a simple addition of 40 to whatever the preceding expression evaluates to.
Given the unclear nature of the expression, it's not possible to provide a meaningful mathematical answer without further context or clarification. If this is part of a larger problem or if there are specific instructions or context that accompany this expression, please provide that information for a more accurate analysis.