$0,04+0,2$

$\sqrt{x}-\frac{1}{x}+\sin\left(x\right)$

$\lim_{x\to+0}\left(\frac{\sin\left(x\right)+\cos\left(\frac{1}{x}\right)}{x^3+2\ln\left(x\right)}\right)$

$-2\:\:\left(-4\right)\:+\:\left(-3\right)\:\:\left(-2\right)-3+2\:\:\left(+4\right)\:+\left(-2\right)\:\:\left(-3\right)$

$\left(cos^2\left(x\right)-cos\left(x\right)\right)\left(1+sec\left(x\right)\right)=-sin^2\left(x\right)$

$\frac{1\:-\:cos\:\theta}{sin\left(\theta\right)}=\:csc\:\theta\:-\:cot\:\theta$

$\frac{d}{dx}\left(4x^3+11xy^2-2y^3=0\right)$