$\lim_{x\to0}\left(\frac{sin\:\left(x\right)-\:sin\:\left(h\right)\left(x\right)}{cos\:\left(x\right)-cos\left(h\right)\left(x\right)}\right)$

$\left(3x^2+7z^4\right)^2$

$\int\frac{6}{5}x\cdot cos\left(x^2-\pi\right)$

$0,09x^{6}+1-0,6x^{3}$

$b+3b+5b+b+b$

$\left(2-6rs\right)\left(6rs+2\right)$

$\frac{dy}{dx}=\frac{15x^5}{y^2}$