1−cos2e=sin2e1-\cos^2e=\sin^2e1−cos2e=sin2e
(25x)7(1514x)3\frac{\left(\frac{2}{5}x\right)^7}{\left(\frac{15}{14}x\right)^3}(1415x)3(52x)7
csc(x)−cos(−x)cot(x)\csc\left(x\right)-\cos\left(-x\right)\cot\left(x\right)csc(x)−cos(−x)cot(x)
2x2−6x+3x+4x2x^2-6x+3x+4x2x2−6x+3x+4x
x2+2x−29x^2+2x-29x2+2x−29
8x2−2x−108x^{2}-2x-108x2−2x−10
4x2+21x−184x^2+21x-184x2+21x−18
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