Use exactly three 7s in every expression and no other digits/numbers.
Choose from among addition, subtraction, division, and/or multiplication operations.
You may use parentheses, brackets, and/or braces for grouping and/or multiplication, as needed.
You may use decimal points. In addition to this/more specifically to this, you may use the decimal point where it immediately precedes the digit and at the same time is above the digit to indicate that digit repeats forever. For example, .1 (with a decimal point over the one) is equal to .111... = 1/9.
No concatenation is allowed.
You may not use factorial signs.
You may use a finite number of square roots.
Exponentiation is not allowed.
No other characters or operations may be used.
Note: Expressions with forms of A + B and B + A will be considered the same, as will be -A + B with B - A, and A(B) with B(A), and A(B) + C with C + A(B), etc.
Create a minimum of three essentially different solutions based on the note above.