x2−4x+4x2+1\frac{x^2-4x+4}{x^2+1}x2+1x2−4x+4
6c2+7c+26c^2+7c+26c2+7c+2
7x2+6x7x^2+6x7x2+6x
3a2−2ab23a^2-2ab^23a2−2ab2
27x6+512y927x^6+512y^927x6+512y9
7x2y+14x2−3y+2y−8x2−9xy+3x2y7x^2y+14x^2-3y+2y-8x^2-9xy+3x^2y7x2y+14x2−3y+2y−8x2−9xy+3x2y
sin2xcos4xsin^2xcos^4xsin2xcos4x
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