$\lim_{x\to\infty}\left(\frac{x+3}{x-1}\right)^{\left(x+4\right)}$

$\left(\frac{1}{6}b-\frac{5}{7}\right)^2$

$-\frac{\left(-5\right)}{\left(-5\right)}$

$\int\sqrt{1296-x^2}dx$

$3xy^2+6xy+21x$

$2\left(x-6\right)\left(x+3\right)-4\left(x^2-x+1\right)\left(x-6\right)+3\left(x-5\right)\left(x^2+1\right)$

$\int_2^4\left(\frac{1}{x^2\left(-6x+5\right)}\right)dx$