$\left(-x^3+4x^2-x+4\right)+\left(3x^2-x^3+5x\right)-5$

$6a+5b\cdot3a-2b$

$x^2-\left(\frac{3x^2-15x+54}{2}\right)=0$

$2\sin\left(x\right)\cos\left(x\right)+2\sin\left(x\right)+1$

$\left(\frac{9}{5}+\frac{7v}{9}\right)^2$

$\int_{-\infty}^4\left(2ex\right)dx$

$\frac{d^2}{dx^2}\left(2xy+y^2+2x-5\right)$