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12-15 yrs
(a+b)^2 – (a-b)^2 =4ab
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12-15 yrs
(a+b)^3 or Cubic Identity
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12-15 yrs
(a+b+c)^2
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3-5 yrs
3D Colour Solid Set 10 cm
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4th-7th
3D Solid Set 5 cm
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