$7^6\cdot7^{-4}$

$\int\frac{\left(2x^2+3\right)}{\left(x^2+2\right)\left(x-4\right)}dx$

$25x^2+100x$

$ycos\left(xy\right)dx+xcos\left(xy\right)dy=0$

$\sqrt{\left(1-x^2\right)^{\frac{3}{2}}}$

$\lim_{x\to1}\left(\frac{x^3+x^2-3x-3}{x^3+7x^2-11x+3}\right)$

$\left(1+\left(\frac{1}{k}\right)\right)^k$