Square power excercises till 400

Calculate:

The number of examples:
Numerical difficulty:
Range of values:
Multiplicity:

72	+	52	=
92	+	52	=
82	+	92	=
92	+	82	=
42	+	12	=
82	+	52	=
112	+	62	=
22	+	12	=
42	+	32	=
82	+	22	=