$\frac{22^4}{22^3}$
$6x-x^2+9$
$sin\left(y-x\right)\:+\:cos\left(x\right)$
$\lim_{x\to0}\left(\frac{6^x-5^x-1}{x^2-1}\right)$
$a^3-3a^2+5ab^2$
$\frac{-1+\tan\left(x\right)^2}{\sec\left(x\right)^2-2}$
$x^2-5x-33$
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