4° W Long and 41°N Lat = 0° and 52° N Lat=
12º E Long and 43° N Lat =
31º E Long and 51°N Lat =
2º E Long and 48° N Lat =
21° W Long and 65°N Lat =
11º E Long and 60°N Lat=
25°E Long and 60°N Lat =
90°W Long and 38°N Lat =
0.34°E Long and 34° N Lat =

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Amath expression is a collection of one or more terms, which are separated by the signs ( + , - , x , / ).example :   8+b8+b  or  a−3a−3in algebra, an equation is a mathematical statement with two expressions where, each expression is separated by an equal (=) sign. variables can be present on both the sides of the equality (=) sign and we use letters to denote such variables.example 1:   x=4+2x=4+2  , [here, we can observe that the variable is present only on one side of the equation].example 2:   2x+3=x+42x+3=x+4  , [here, we can observe that the variables are present on both side of the equation].