$\int_1^{\infty}\left(\frac{5}{x^2}\right)dx$

$\int x^{\frac{13+\sqrt{5}}{2}}sin\left(x\right)dx$

$72x^2-x-1$

$\frac{\left(6-3\cdot2\right)}{\left(9\cdot2+3\right)}$

$\log_{49}\left(7x+13y\right)=0.5+\log_{49}\left(2y\right)$

$f\left(5\right)=3\sqrt{x}-\frac{\sqrt{x^3}}{2}$

$y'+2xy=8x$