$secx\left(1-sin^2x\right)cscx$
$4x^3-6x^2$
$4x^2-13x+9=0$
$5a^{3}-2a^{2}\right)+\left(6a^{3}+9a^{2}+8a\right)$
$\int\frac{4ln\left(x\right)}{x^2}\cdot dx$
$z=xy\cos\left(x\right)+yln\left(x\right)$
$3\left(1\right)\left(z\right)^2$
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