$\left(2x+3\right)^2-\left(4y-5\right)^2$
$-6+5y^{3}+6-6y^{3}+5y^{3}-4-x$
$\tan\left(a\right)^2+\cot\left(a\right)^2=\sec\left(a\right)^2+\csc\left(a\right)^2-2$
$\frac{dy}{dx}=e^{5y+4x}$
$\left(+12\right)+\:\left(-9\right)-\left(-5\right)$
$\left(2x+a^3\right)^2$
$\left(x+2y-z\right)^2$
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