$4\cos^26x-2=0$
$2\log_{25}\left(x\right)$
$\left(10x+6b\right).\left(10x-6b\right)$
$x^2\:a^2-1\:-a\:9^2-1$
$5\left(x-2\right)-4\left(2x+1\right)<-3x+3$
$\left(\frac{1}{cos\:x}+\frac{1}{sen\:x}\right)\frac{1}{csc\:x}-\frac{sen\:x}{cos\:x}$
$8a-\left(7a+2b\right)-a-2b+1$
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