2π∫0πx⋅cos(nx)dx\frac{2}{\pi}\int_0^{\pi}x\cdot\cos\left(nx\right)dxπ2∫0πx⋅cos(nx)dx
6(3x+1)−14(2−4x)≥3(−5x−4)+49x6\left(3x+1\right)-14\left(2-4x\right)\ge3\left(-5x-4\right)+49x6(3x+1)−14(2−4x)≥3(−5x−4)+49x
9x2−12x+1=09x^2-12x+1=09x2−12x+1=0
ddx(cos y2)\frac{d}{dx}\left(cos\:y^2\right)dxd(cosy2)
1.6cos(π 0.8x)+2.2, x=11.6cos\left(\frac{\pi\:}{0.8}x\right)+2.2,\:x=11.6cos(0.8πx)+2.2,x=1
csc2acota=cscaseca\frac{\csc^2a}{\cot a}=\csc a\sec acotacsc2a=cscaseca
−98+−789+452-98+-789+452−98+−789+452
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