$32-15+2-7-0.1-14\cdot0.7$
$-2x\:-\:\left(3x\:+\:2x\:-\:x\right)\:+\:8x$
$\left(siny+cosy\right)\left(cscy-secy\right)$
$x^2+2x+24=0$
$\left(30-x\right)^4$
$7+9y-3y$
$x+2>=6$
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