$tan\left(x-45\right)tan\left(x+45\right)=-1$
$\left(9x^3-2y\right)^2$
$5x^2=5x$
$\left(5x^2+1\right)^4$
$y=\left(x^{\left(5\right)}+8x^{\left(-3\right)}\right)^{\left(-5\right)}\left(-3x^{\left(3\right)}+2x^{\left(-3\right)}\right)^{\left(5\right)}$
$\frac{dy}{dx}y^2+5-4x+9x^2=0$
$\left(3x^2-5x-6\right)+\left(5x^2+8x-9\right)$
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