$\int\left(\frac{arcctg\left(6x\right)}{36x^2+1}\right)dx$

$\left(\frac{3}{4}a-\frac{2}{3}b\right)^2$

$a^2-14ab+49b^2$

$3x+8=-4$

$\left(2x^{n+1}+\frac{3}{7}y^n\right)^4$

$f\left(1\right)=\frac{4x^{\frac{1}{12}}-x^{\frac{1}{3}}-3}{12x^{\frac{3}{4}}\left(x^{\frac{1}{3}}-1\right)^2}$

$3x^2-12x-11=0$