$5\:2\:3-3\:3\:2$
$x+10=27$
$\sin\left(x\right)\sec\left(x\right)-\tan\left(x\right)\csc\left(x\right)$
$\left(2x^2+5y\right)^2$
$\left(k-1-3\sqrt{k}\right)\left(k-1+3\sqrt{k}\right)$
$\frac{3x^2-5x+1}{\left(x-2\right)\left(x^2+4x+5\right)}$
$\frac{3x+5}{2}\ge0$
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