$\left(6a+5b-8c\right)+\left(5a-5b+4c\right)-\left(2a+3c-5b\right)$

$sin\left(y\right)cos\left(x\right)dx\:+\:dy=0$

$\left(2-x\right)\left(5+y\right)$

$2n^2\cdot2n^2$

$\int\left(\frac{\left(1+e^x\right)}{\left(1-e^x\right)}\right)dx$

$500-\left(-5\right)$

$\frac{x^4}{x^5}$