Array ( [0] => -20 [1] => -10 [2] => 0 [3] => 10 [4] => 20 [5] => 30 [6] => 40 )
Array ( [0] => -8 [1] => 12 [2] => 32 [3] => 52 [4] => 72 [5] => 92 [6] => 112 )

array(7) { [0]=> int(-20) [1]=> int(-10) [2]=> int(0) [3]=> int(10) [4]=> int(20) [5]=> int(30) [6]=> int(40) }
array(7) { [0]=> int(-8) [1]=> int(12) [2]=> int(32) [3]=> int(52) [4]=> int(72) [5]=> int(92) [6]=> int(112) }

-20
-8-10
120
3210
5220
7230
9240
112