$a^2-2a-24$

$\left(\frac{\frac{1}{3}\left(5\right)}{3}\right)\left(\frac{11}{4}\right)-0.8\left(\frac{1}{2}\right)$

$\frac{25x^2-16y^2}{5x-4y}$

$-\left(3+10-4\right)-\left(-1+5\right)$

$\int e^{i+t}dx$

$dy-6xdx=0$

$\int\frac{3x-7}{\left(x^2+2\right)\left(x-3\right)}dx$