$\:f\left(x\right)\:\:=\:\:3\:\cdot\:x^2\:-\:2\:y\:g\left(x\right)\:\:\:2\cdot\:x\:-\:1\:\left(\:\frac{f}{g}\right)\:\left(4\right)\:$

$\left(3b+2\right)\left(3b+2\right)$

$\left(2xy^3+1\right)dx+\left(3x^2y^2-\left(\frac{1}{y}\right)\right)dy=0$

$\int\frac{8x^3}{\sqrt{4x^2+9}}dx$

$3\cos^2\left(x\right)-\cos\left(x\right)=0$

$\frac{11}{3}s-\frac{3}{4}t+\frac{2}{3}s-\frac{1}{3}s-\frac{5}{3}s+t+\frac{1}{4}t$

$3\left(-9n-1\right)$