$\int\frac{5x^3+2x^2-40x-21}{x^2-9}dx$

$a^6+64b^6$

$\int\left(\frac{3}{4}-\frac{7x}{3}\right)^5dx$

$-3+3-\left(-3\right)$

$2\left(1-2\right)-3\left(3x-2\right)+\left(11x-4x^2-6\right)-2\left(4x-3\right)$

$-2-\left[5-\left(1-7\right)-6\right]$

$\int\frac{lnx+2}{x\left(lnx+1\right)^2}dx$