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\(2 a - a = a\)

\(-2 a - 3 a = -5 a\)

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

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

\(x - 8 y - 6 x = -5 x - 8 y\)

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

\(8 p - 5 q - 4 p + q = 4 p - 4 q\)

\(3 x - 5 + 9 x + 1 = 12 x - 4\)

\(-4 a + -3 b + 8 a = 4 a - 3 b\)

\(-2 a - -8 a + 4 b = 6 a + 4 b\)

\(a + 6 a b - 8 b - 7 a b = a - 8 b - a b\)

\(-9 x y + 2 y - 5 x y - 2 y = -14 x y\)

Kan niet korter.

Kan niet korter.

\(p + p + p + p + p + p + p = 7 p\)

\(2 p + 8 p = 10 p\)

\(8 a b + 4 a b = 12 a b\)

\(2 x + 7 x + 9 x = 18 x\)

\(-7 x + 7 x = 0\)

\(8 ⋅ -7 a = -56 a\)

\(7 a ⋅ 3 b = 21 a b\)

\(-6 p ⋅ -3 q = 18 p q\)

\(4 a ⋅ 5 a = 20 a^{2}\)

\(-4 x ⋅ 5 y ⋅ 3 z = -60 x y z\)

\(3 x ⋅ -2 y ⋅ -5 x = 30 x^{2} y\)

\(0 ⋅ 5 x = 0\)

\(4 p ⋅ -5 p q = -20 p^{2} q\)

\(-3 b ⋅ -4 ⋅ a b = 12 a b^{2}\)