$\frac{\csc\left(t-1\right)}{\cot\left(t\right)}$
$\sqrt{5^2}\cdot12^2$
$49.y^2-81.x^2$
$1-3x\ge x+1$
$0.8\cdot39+4.2$
$8-\left(-2\right)\cdot3+6$
$9x^6+12x^3+004$
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