$-525+\left(-101\right)$
$x\cos\left(y\right)\frac{dy}{dx}=2x-seny$
$b^3-b^2c$
$4x^3-6x+2$
$x^2-32x-68$
$\sec\left(x\right)^2=\frac{1}{1-sin^2\left(x\right)}$
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