$\frac{1}{x+a}+\frac{x^2}{a^2+ax}$
$24>y-4$
$x^3-121x$
$\int\left(\frac{x^2+3x+1}{x^2-2x-3}\right)dx$
$\left(4.3-1.6\right)$
$\left(3+i\right)-\left(5-7i\right)\left(-2+2i\right)$
$16x-20y=-5\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:$
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