$x^2-x=14$
$\left(x-a^2\right)+y^2=a^2$
$-4x-y+5-2x-6$
$\frac{1}{2}\ln\left(y^2+2\right)=\frac{1}{2}\left(\ln\left(4+x^2\right)\right)$
$\frac{x^4+4x^3-4x^2-5}{-2}$
$6-5\cdot[-\left(-1\right)-2\cdot3+4\cdot\left(-6+8\right)]$
$-4\left(8+8k\right)$
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