Beyond the Basics

133. $(x + y) (x^{2} - x y + y^{2} + 1)$ $(x + y) (x^{2} - x y + y^{2} + 1)$
134. $(x^{2} + 3 x - 1) (x^{2} - 3 x - 1)$ $(x^{2} + 3 x - 1) (x^{2} - 3 x - 1)$
135. $(x^{2} + x y + y^{2}) (x^{2} - x y + y^{2})$ $(x^{2} + x y + y^{2}) (x^{2} - x y + y^{2})$
136. $(x^{2} + 2 x y + 2 y^{2}) (x^{2} - 2 x y + 2 y^{2})$ $(x^{2} + 2 x y + 2 y^{2}) (x^{2} - 2 x y + 2 y^{2})$
137. $(x - 2) (x + 2) (x^{2} - 2 x + 4) (x^{2} + 2 x + 4)$ $(x - 2) (x + 2) (x^{2} - 2 x + 4) (x^{2} + 2 x + 4)$
138. $(x + 1) (x^{2} - x + 1) (x - 3) (x^{2} + 3 x + 9)$ $(x + 1) (x^{2} - x + 1) (x - 3) (x^{2} + 3 x + 9)$
139. $(x - 8) (x + 5) (x - 2) (x - 1)$ $(x - 8) (x + 5) (x - 2) (x - 1)$
140. $(2 x + y - z) (2 x - y + z)$ $(2 x + y - z) (2 x - y + z)$
141. N/A
142. $3 (x - y) (y - z) (z - x)$ $3 (x - y) (y - z) (z - x)$
143. $3 x y z (x - y) (y - z) (z - x)$ $3 x y z (x - y) (y - z) (z - x)$
144. $(x + y) (y + z) (z + x)$ $(x + y) (y + z) (z + x)$

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Table of Contents for Beyond the Basics