cos2xcos2x\frac{cos2x}{cos^2x}cos2xcos2x
3x<273x<273x<27
d12ydx12=x\frac{d^{12}y}{dx^{12}}=xdx12d12y=x
(4−14x5)7\left(4-\frac{1}{4}x^5\right)^7(4−41x5)7
a4−10a2+9a^4-10a^2+9a4−10a2+9
a−4⋅a2a^{-4}\cdot a^2a−4⋅a2
sen2 x−sec xtan x\frac{sen^2\:x-sec\:x}{tan\:x}tanxsen2x−secx
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