3a2(5a2+4a−2)3a^2\left(5a^2+4a-2\right)3a2(5a2+4a−2)
25.525^{.5}25.5
1cos(x)=cos(x)1+sin(x)−tan(x)\frac{1}{\cos\left(x\right)}=\frac{\cos\left(x\right)}{1+\sin\left(x\right)}-\tan\left(x\right)cos(x)1=1+sin(x)cos(x)−tan(x)
13a+9a+6a13a+9a+6a13a+9a+6a
−150x2+237x+43-150x^2+237x+43−150x2+237x+43
19219^2192
7.61−z>−3.067.61-z>-3.067.61−z>−3.06
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