$-9x^4+7x^2+5;\:x=1$
$\left(43-x\right)^2$
$\frac{d}{dx}\left(\left(x\right)-ln\left(x\right)-\frac{\pi}{4}\right)$
$\cos^2\left(x\right)=1+\cot^2\left(x\right)$
$\:0,09y^2-1$
$6^2+37x+45$
$\left(3x^3+9x\right)^2$
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