$150\left(\frac{5}{1}\right)\left(\frac{250}{1}\right)$

$f\left(x\right)=x\left(x^{2\:\:}\right)$

$\int\frac{1+3x}{-3x^2-2x+1}dx$

$\int\frac{t^2+3t+1}{\left(t^2-9\right)\left(t+5\right)}dy$

$\frac{5+3x}{10}-\frac{2\left(x-1\right)}{8}=1$

$\lim_{n\to\infty}\left(\left(2-\frac{1}{x^{2}}\right)\right)$

$\left(-5nh^{3}\right)\left(-7n^{2}h$