In order to simplify the mathematical expressions, we need to apply VBODMAS or VPEDMAS rule.
V = Virnaculum (or Bar) |7|=7 and |-7|=7
B = Brackets (), {}, []
P = Parentheses (), {}, []
O = Order power, square, roots etc.
E = Exponents power, square, roots etc.
DM = Division + Multiplication left to right
AS = Addition + substation left to right

Steps to follow:
  1. If it contains virnaculum, need to do simplify it first
  2. Bracket operations in the order of (), {}, []
  3. Evaluate exponents
  4. Division and multiplication from left to right
  5. Addition and subtraction from left to right

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