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x+4=12

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3 × (8 + 2) 2x + 5 = 17 15% of 240
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    ▱RectangleS = a × b ◯CircleS = π × r² △Trianglec² = a² + b² %Percentagespart = whole × p / 100

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    AC⌫%÷ 789× 456− 123+ 0.=

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