Sunday puzzles: mathrax

Puzzle 1:

0537 Mathrax 8×8 07-12-14

Fill in the numbers 1-8 on each row and column. On some intersections you find hints. E means that in all four squares the number is even, and O means that all four numbers are odd. A number and a sign (+, -, x, /) means that that is the result of the two paired diagonally adjacent squares.

Puzzle 2:

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