$3x^5.2x$

$\int\left(-2x^2\right)\cdot\sin\left(4x\right)dx$

$\int\left(z^2+2\right)\left(z^2+6z-10\right)^2dz$

$4\cos^2\left(a\right)-5\cos\left(a\right)+1=0$

$\frac{9x^{3}+24x^{2}+13x+2}{\left(3x+1\right)^{2}}$

$\int\left(\frac{x^2+3}{4}\right)dx$

$\int6x\sqrt{4-x^2}dx$