ddx3y\frac{d}{dx}3ydxd3y
−29≥136−n-29\ge136-n−29≥136−n
200−1.5200-1.5200−1.5
cos(2x−90)=−1\cos\left(2x-90\right)=-1cos(2x−90)=−1
xa−xb=1a+b\frac{x}{a}-\frac{x}{b}=\frac{1}{a+b}ax−bx=a+b1
6m3+3m6m^3+3m6m3+3m
exe−2x\frac{e^x}{e^{-2x}}e−2xex
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