$\frac{\csc\left(\sin^2\left(x\right)+\cos^2\left(x\right)\tan\left(x\right)\right)}{\sin\left(x\right)+\cos\left(x\right)}$

$f\left(x\right)=-2x^4+5x^3-x$

$6x+6\left(6-6x\right)$

$\left(x^2-y\right)dx-xdy$

$6\sqrt{25}$

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

$36^2+84+49$