Anyone Want my number

The increased availability of formerly exotic foods on a global scale led to the development of a new food trend called modern

Identify the expression 8 + 8 + 8 + 8 as a numerical expression or a variable expression. for a variable expression, name the variable.

Riddle me this: i am first in earth, second in heaven, appear two times in aweekyou can only see meonce in a year, althoughi'm in the middle of sea. what am i?