$\int\left(\frac{\left(40\right)}{\left(7-8x\right)^6}\right)dx$

$e^{2y}-y\cos\left(xy\right)dx+\left(2e^{2y}-x\cos\left(xy\right)+2y\right)dy=0$

$s^2+7s-7s-49$

$1-49a^2b^2$

$\int\frac{\left(x^2-x-5\right)}{x^3+5x^2}dx$

$\lim\:_{x\to\:\infty\:}\:\frac{\sqrt{x^6+3}}{7x^2+5}$

$\int_1^3x\cdot\left(1+2i\left(x-2\right)\right)dx$