$\frac{dy}{dx}=cos\left(y-x\right)$
$\left(4-2j\right)\left(-6+5j\right)$
$-\frac{1}{4y+6}$
$x^2+4x+3>0$
$7x^2+10x-8$
$\int3\left(3x-7\right)^4dx$
$\frac{6x^2-7x-5}{2x+6}$
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