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2−sec2xsec2x=cos(2x)\frac{2-\sec^2x}{\sec^2x}=\cos\left(2x\right)sec2x2−sec2x=cos(2x)
2x2+11x2+23x+20 2x+5\frac{2x^2+11x^2+23x+20\:}{2x+5}2x+52x2+11x2+23x+20
∫3tan2(x)dx\int3\tan^2\left(x\right)dx∫3tan2(x)dx
x2−15x+156=0x^2-15x+156=0x2−15x+156=0
7 x pq7\:x\:\frac{p}{q}7xqp
sin2e(cose+tane)(cose−tane)=1−tan2e\sin^2e\left(\cos e+\tan e\right)\left(\cos e-\tan e\right)=1-\tan^2esin2e(cose+tane)(cose−tane)=1−tan2e
(10x2+20x+10)5x+5\frac{\left(10x^2+20x+10\right)}{5x+5}5x+5(10x2+20x+10)
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