−9−(−10+(15−25))-9-\left(-10+\left(15-25\right)\right)−9−(−10+(15−25))
∫arctan(12x)4+x2dx\int\frac{arctan\left(\frac{1}{2}x\right)}{4+x^2}dx∫4+x2arctan(21x)dx
221\sqrt[1]{2^2}122
x6−y6x3−y3 \frac{x^6-y^6}{x^3-y^3\:}x3−y3x6−y6
−x2+21x+1782-x^2+21x+1782−x2+21x+1782
115π180\frac{115\pi}{180}180115π
cscx+cotx=cotx2\csc x+\cot x=\cot\frac{x}{2}cscx+cotx=cot2x
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