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\(4 a - 2 a = 2 a\)

\(-p - 8 p = -9 p\)

\(-6 a b - 4 a b = -10 a b\)

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

\(-9 x + 8 y - 7 x = -16 x + 8 y\)

\(3 a - 7 b + b = 3 a - 6 b\)

\(-5 a + 9 b - 6 a + 4 b = -11 a + 13 b\)

\(2 a + 8 - 7 a + 6 = -5 a + 14\)

\(x + -8 y - 9 x = -8 x - 8 y\)

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

\(4 p + 9 p q - 6 q - 8 p q = 4 p - 6 q + p q\)

\(-3 a b - 4 b - 8 a b + 4 b = -11 a b\)

Kan niet korter.

Kan niet korter.

\(x + x + x + x + x = 5 x\)

\(6 x + 2 x = 8 x\)

\(a b + 9 a b = 10 a b\)

\(8 x + 3 x + 7 x = 18 x\)

\(-5 a + 5 a = 0\)

\(9 ⋅ 4 x = 36 x\)

\(3 x ⋅ y = 3 x y\)

\(-8 x ⋅ -2 y = 16 x y\)

\(2 x ⋅ -6 x = -12 x^{2}\)

\(3 a ⋅ -2 b ⋅ 4 c = -24 a b c\)

\(-a ⋅ 2 b ⋅ -5 a = 10 a^{2} b\)

\(2 p ⋅ 0 = 0\)

\(-3 p ⋅ -6 p q = 18 p^{2} q\)

\(4 y ⋅ 3 ⋅ -x y = -12 x y^{2}\)