xy + zx '
xy + zx ' + wyz
xy + zx' + yz
xy + zx' + wz
Product-of-sums
Sum-of-products
Karnaugh map
Matrix
8
6
64
26
Mapping
Graphing
T-map
karnaugh-map
w' x', w' y', x' y', wxy, wyz
wxy, wyz'
w' x', w' y', x' z'
w' x', w' y', x' z, wxy'