$\left[3+5\:.\:\left(8-9\right)\right]-\left[7-4\:\:.\:\left(5-3\right)\right]$

$\int\frac{x+2}{x-9}dx$

$\left(x^{2\:}+16y^2-10x+64y+73=0\right)$

$\left(x^2-8x\right)\left(+16\right)$

$\int\frac{x^3}{\sqrt{27+x^2}}dx$

$\int\left(\frac{3}{4}x^{-1}\right)dx$

$a=-3,b=-4,c=-5$