$9x=135$
$w\:=\:\tan\left(\frac{x}{2}\right)\:+\:2\sin2\left(\frac{x}{2}\right).\cot\left(x\right)$
$6,728\:-\:3,125\:-\:9,307\:+3,9\:$
$x=3.581x\sin\left(45\right)$
$\frac{\left(x^2-4x+4\right)}{x^2-4}$
$7+25+-1$
$2\sec\left(x\right)-\tan\left(x\right)$
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