$\int_1^e\left(ln20x\right)dx$

$\lim_{x\to1}\left(\frac{\left(\ln\left(n\right)\right)^2}{x-1}\right)$

$4.1^2\left(3\sqrt{1}-8\sqrt[3]{1}-2\right)$

$mn;\:m=3;\:n=4$

$6x^{5}+564x^{3}+1260x^{2}+550x-750$

$\lim_{x\to0}\left(\frac{128\cos\left(x\right)-128}{x^2}\right)$

$y'+\frac{6y}{x+4}=\left(x+4\right)^7$