\(-5 ⋅ -3 a = 15 a\)

\(6 a ⋅ 5 b = 30 a b\)

\(4 x ⋅ -y = -4 x y\)

\(-3 p ⋅ 2 p = -6 p^{2}\)

\(3 x ⋅ 2 y ⋅ -4 z = -24 x y z\)

\(-2 a ⋅ -3 b ⋅ -4 a = -24 a^{2} b\)

\(3 x + 9 x = 12 x\)

\(8 a b + 9 a b = 17 a b\)

\(4 x + 9 x + 7 x = 20 x\)

Kan niet korter.

\(0 ⋅ -5 x = 0\)

\(-a ⋅ -7 a b = 7 a^{2} b\)

\(b ⋅ -2 ⋅ 3 a b = -6 a b^{2}\)

\(x + x + x + x + x + x + x + x = 8 x\)

\(7 a - 2 a = 5 a\)

\(-2 x - 4 x = -6 x\)

\(-3 a b - 6 a b = -9 a b\)

\(0 - 9 x = -9 x\)

Kan niet korter.

\(-a + a = 0\)

\(x - 3 y - 5 x = -4 x - 3 y\)

\(4 p - 2 q + 8 q = 4 p + 6 q\)

\(5 x - 4 y - 2 x - 8 y = 3 x - 12 y\)

\(8 a - 7 + 6 a - 5 = 14 a - 12\)

\(-7 x + -5 y + 9 x = 2 x - 5 y\)

\(5 a - -8 a + 2 b = 13 a + 2 b\)

\(-3 p - 7 p q + 8 q - p q = -3 p + 8 q - 8 p q\)

\(4 x y - 8 y + 3 x y + 8 y = 7 x y\)