$169-1.96$
$\frac{\cosb}{\sinb}\times\tanb-\cos^{2}b$
$x+6>3x-2$
$-x\:=\:\:5$
$2\left(5+4\left(4\right)\right)$
$144x^2+72xy+9y^2$
$\left(\sec\left(x\right)-\tan\left(x\right)\right)\left(1+\sec\left(x\right)\right)$
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