$2\sin x+3=\sin x$
$\:\tan\:x-1=0$
$15c^2d^2+\:60c^2d^2$
$4a+20c$
$2 ( 3 x ^ { 2 } ) ^ { 3 }$
$x^2+26x-129$
$64x^2-90x+25$
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