Evaluate the following :
`(-5)xx6xx(-3)xx(-7)`.

Answer

To evaluate the expression \((-5) \times 6 \times (-3) \times (-7)\), we can follow these steps:

### Step 1: Write down the expression
We start with the expression as given:
\[ (-5) \times 6 \times (-3) \times (-7) \]

### Step 2: Multiply the first two numbers
First, we multiply \(-5\) and \(6\):
\[ -5 \times 6 = -30 \]

### Step 3: Multiply the result with the next number
Next, we take the result \(-30\) and multiply it by \(-3\):
\[ -30 \times (-3) = 90 \]
(Note: The product of two negative numbers is positive.)

### Step 4: Multiply the result with the last number
Now, we take the result \(90\) and multiply it by \(-7\):
\[ 90 \times (-7) = -630 \]

### Final Result
Thus, the final result of the expression \((-5) \times 6 \times (-3) \times (-7)\) is:
\[ \boxed{-630} \]