Determine the contants.and veriables,then tell if it is mathematical equation or expression

Answer:
Variable - a
Constant - 2
* Expression√
Variable - F
Constant - 5,10
* Equation√
Variable - Y
Constant - 4
* Expression√
Variable - k
Constant - 6,22
* Equation√
Variable - x
Constant - 6,14
* Equation√