$24-5x-4+6x-8+2x$
$2\sin^2x-\tan x=0$
$3x+9>5$
$-8x\:+4$
$sec\:0\:-\:sen\:0\:\cdot tan\:0=\:cos\:0$
$16+x=5$
$9x^2-15x-6$
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