\(2 x ⋅ -4 = -8 x\)

\(4 p ⋅ 7 q = 28 p q\)

\(-3 a ⋅ -4 b = 12 a b\)

\(4 a ⋅ -8 a = -32 a^{2}\)

\(-4 x ⋅ 2 y ⋅ -5 z = 40 x y z\)

\(3 a ⋅ -4 b ⋅ -2 a = 24 a^{2} b\)

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

\(2 a b + a b = 3 a b\)

\(8 p + 2 p + 6 p = 16 p\)

Kan niet korter.

Kan niet korter.

\(0 ⋅ 5 a = 0\)

\(4 x ⋅ -5 x y = -20 x^{2} y\)

\(-5 b ⋅ 1 ⋅ 2 a b = -10 a b^{2}\)

\(x + x + x + x + x + x + x = 7 x\)

\(x - 2 x = -x\)

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

\(-9 x y - 6 x y = -15 x y\)

\(0 + 9 p = 9 p\)

\(-3 a + 3 a = 0\)

\(-5 a - 2 b - 6 a = -11 a - 2 b\)

\(-4 a + 6 b + 5 b = -4 a + 11 b\)

\(-8 x - 2 y - 7 x + 3 y = -15 x + y\)

\(-6 x + 5 + 3 x - 1 = -3 x + 4\)

\(-p + -6 q + 9 p = 8 p - 6 q\)

\(6 p - -5 p - 2 q = 11 p - 2 q\)

\(7 x - 6 x y + 3 y + 5 x y = 7 x + 3 y - x y\)

\(-9 a b + 7 b - 5 a b - 7 b = -14 a b\)