Find the equation of function after the transformation of the parent function.

The parent function is $\"\"$ .

The parent function translated $\"\"$ units left, so $\"\"$ becomes $\"\"$ .

Then the function $\"\"$ .

The function translated $\"\"$ units down means subtracting the value of function by $\"\"$ .

Since subtracting the value of function by $\"\"$ , the function become changed to $\"\"$ .

The equation of function after the transformation of the parent function is $\"\"$ .