\(-2 ⋅ -9 p = 18 p\)

\(3 a ⋅ 2 b = 6 a b\)

\(-4 a ⋅ 2 b = -8 a b\)

\(-5 x ⋅ -6 x = 30 x^{2}\)

\(-x ⋅ 2 y ⋅ 5 z = -10 x y z\)

\(2 x ⋅ 3 y ⋅ -4 x = -24 x^{2} y\)

\(3 a + 8 a = 11 a\)

\(7 x y + x y = 8 x y\)

\(8 a + 3 a + 6 a = 17 a\)

Kan niet korter.

\(0 ⋅ -4 a = 0\)

\(-6 x ⋅ 2 x y = -12 x^{2} y\)

\(-2 q ⋅ -1 ⋅ -3 p q = -6 p q^{2}\)

\(x + x + x + x = 4 x\)

\(6 x - 3 x = 3 x\)

\(-8 a - 9 a = -17 a\)

\(-7 a b - 9 a b = -16 a b\)

\(5 p + 0 = 5 p\)

Kan niet korter.

\(4 p - 4 p = 0\)

\(-9 a + 8 b - 7 a = -16 a + 8 b\)

\(-8 x + 5 y + 3 y = -8 x + 8 y\)

\(6 x - y - 8 x - 7 y = -2 x - 8 y\)

\(-7 a - 1 - 6 a + 5 = -13 a + 4\)

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

\(-x - -4 x - 2 y = 3 x - 2 y\)

\(-a + 8 a b + 6 b - 2 a b = -a + 6 b + 6 a b\)

\(3 a b - 9 b + 2 a b + 9 b = 5 a b\)