$\int\left(x\cdot arctng\left(\sqrt{x^2-1}\right)\right)dx$
$\left(3a^2-1\right)\cdot\left(3a^2+1\right)$
$14-16+8+12+8+6$
$k^2+121+22k$
$\frac{dp}{dt}=t+p$
$\left(x+y\right)\cdot dx+\left(x-y\right)\cdot dy=0$
$\left(6x^2-10y\right)^2$
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