$-22+8t+13n-3t-5n+23$
$\:20\:-\:12\:+\:4x\:-\:4x\:+\:x\:+\:12y\:-\:8y$
$\int\frac{x-3}{\left(x+3\right)\left(x-1\right)}dx$
$-32+\left(44-55\:\right)-66+\left[-32+10\right]$
$\left(4x^5y\right)^1$
$k-1+k-1+k-1+3$
$\int_{-\infty\:}^0\left(\frac{1}{4+x^2}\right)dx$
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