2+7*99:(-4)=

To solve the expression \( 2 + 7 \times 99 \div (-4) \), we need to follow the order of operations (PEMDAS/BODMAS), which stands for Parentheses/Brackets, Exponents/Orders, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

1. Start with multiplication and division:

   • Calculate \( 7 \times 99 \): \[ 7 \times 99 = 693 \]
   • Now, divide by \(-4\): \[ 693 \div (-4) = -173.25 \]

2. Now, add \( 2 \) to the result: \[ 2 + (-173.25) = 2 - 173.25 = -171.25 \]

So, the final answer is: \[ \boxed{-171.25} \]