$2x-3y=-6$
$\left(x-6y\right)^2+\left(3x-7\right)\left(x-2\right)-12\left(3y^2-5\right)+12xy$
$\frac{dy}{dx}=18x^2-8x$
$-8\cos\left(x\right)\sin\left(x\right)-4\cos\left(x\right)-4\sin\left(x\right)-2=0$
$\left(cos\left(arcsin\left(7x\right)\right)\right)$
$x^2+6x+9=x^2-10x+25$
$7-7t=28$
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