$\frac{12.-3-2}{2.5}-\frac{16n-2}{m}+\frac{1}{-1}$
$\left(-1\:-23\right)\::\:\left(5\:-\:11\right)$
$\left(-55\right)-\left(-32\right)$
$24x^2+24x+6$
$5x\left(n-1\right)+3y\left(n-1\right)$
$\int1+\frac{2}{y}dy$
$\left(tan\left(t\right)-sec\left(t\right)\right)\left(tan\left(t\right)+sec\left(t\right)\right)$
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