4cos2(2π)−3sin2(2π )4cos^2\left(2\pi\right)-3sin^2\left(2\pi\:\right)4cos2(2π)−3sin2(2π)
5 x +12> 15\:x\:+12>\:\:15x+12>1
(1−3x)(2−3xb)\left(1-3x\right)\left(2-3xb\right)(1−3x)(2−3xb)
2x+y=132x+y=132x+y=13
1+tan(x)1−tan(x)+1+cot(x)1−cot(x)\frac{1+tan\left(x\right)}{1-tan\left(x\right)}+\frac{1+cot\left(x\right)}{1-cot\left(x\right)}1−tan(x)1+tan(x)+1−cot(x)1+cot(x)
x2+y; x=−2.y=−7x^2+y;\:x=-2.y=-7x2+y;x=−2.y=−7
∫2(x2+5)(x2+2)2dx\int\frac{2}{\left(x^2+5\right)\left(x^2+2\right)^2}dx∫(x2+5)(x2+2)22dx
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