$2\sin\frac{6}{5}\:x+1=0$
$8 x ^ { 3 } + 18 x ^ { 2 } - 86 x - 30$
$3x^2-22x-16$
$1-sec^2x\:cot^2x\:+-cot^2x$
$10x=140$
$27^{0.5t^2+t}\:.\:3^{0.5t^2+t}$
$x^2+\:12\:\le\:8x$
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