$3y^3+8y+2y^3$

$\int_0^a\left(a\frac{1}{2}-x\frac{1}{2}\right)^2dx$

$6n-4=5n$

$\frac{4x^3-7x^2-21x+9}{4x-3}$

$2884-2622.07143$

$2^2+-3\cdot5$

$\frac{1-2\cos\left(x\right)-3\cos^2\left(x\right)}{\sin^2\left(x\right)}=\frac{1-3\cos\left(x\right)}{1-\cos\left(x\right)}$