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\(5 a - 6 a = -a\)

\(-2 x - 9 x = -11 x\)

\(-9 a b - 4 a b = -13 a b\)

\(0 - 2 a = -2 a\)

\(5 p - 2 q - 9 p = -4 p - 2 q\)

\(-8 a + 9 b - 2 b = -8 a + 7 b\)

\(4 p - 3 q - 6 p + 9 q = -2 p + 6 q\)

\(5 p + 3 + 8 p - 6 = 13 p - 3\)

\(-5 a + -3 b - 6 a = -11 a - 3 b\)

\(x - -2 x - 7 y = 3 x - 7 y\)

\(5 a - 8 a b - b - 4 a b = 5 a - b - 12 a b\)

\(-5 x y + 6 y + 7 x y - 6 y = 2 x y\)

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Kan niet korter.

\(a + a + a + a + a + a + a + a = 8 a\)

\(2 p + 7 p = 9 p\)

\(a b + 4 a b = 5 a b\)

\(4 a + 6 a + 2 a = 12 a\)

\(a - a = 0\)

\(-7 ⋅ 3 x = -21 x\)

\(x ⋅ 8 y = 8 x y\)

\(4 p ⋅ -6 q = -24 p q\)

\(-3 x ⋅ 6 x = -18 x^{2}\)

\(-5 x ⋅ 3 y ⋅ 4 z = -60 x y z\)

\(-2 x ⋅ -3 y ⋅ -5 x = -30 x^{2} y\)

\(-a ⋅ 0 = 0\)

\(-9 a ⋅ -3 a b = 27 a^{2} b\)

\(-y ⋅ -3 ⋅ -4 x y = -12 x y^{2}\)