$7\left(\sec49-\tan105\right)-3\left(\csc17+\cot120\right)$

$sen\:x\left(csc\:x\:+\:sen\:x\right)\:+cos\:x\left(\:secx\:+cosx\right)$

$240y^2-8$

$3^5\cdot3^8\cdot\left(3^2\right)^4\cdot3^0\cdot3\left(3^3\right)^4\cdot3^4\cdot3^2$

$-\frac{1}{6}x-2<-\frac{7}{3}$

$8-x<5x+32$

$\frac{1}{3}k+9=24$