$-4d\:-16$
$57.82-6.23$
$\frac{x^2+x+4}{x-1}$
$2y\:+\:5\:x\:2y\:+\:6$
$1-2\sin x+\sin\left(2x\right)$
$x^2-9x-400$
$log\:\left(5x\right)\:=\:log\:\left(2x+9\right)$
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