225x2−30x+1225x^2-30x+1225x2−30x+1
a−2−b−21a+1b\frac{a^{-2}-b^{-2}}{\frac{1}{a}+\frac{1}{b}}a1+b1a−2−b−2
(tan2 x+1)(cos2 x−1)=−tan2 x\left(tan^2\:x+1\right)\left(cos^2\:x-1\right)=-tan^2\:x(tan2x+1)(cos2x−1)=−tan2x
b2+3+2b2b^2+3+2b^2b2+3+2b2
∣−6∣6\left|-6\right|6∣−6∣6
∫3x2+1dx\int3x^2+1dx∫3x2+1dx
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