$\log\left(x\right)=-2.5$

$4+\left(-2\right)+4-\left(6\right)$

$\left(\:x+4\:\right)\:\left(\:3x\:-9\:\right)$

$xy^2dx+3x^3y^2dy=0$

$4\left(\infty^2\right)+1$

$\frac{\csc\left(x\right)-\cot\left(x\right)}{\csc\left(x\right)}-\frac{\csc\left(x\right)-\cot\left(x\right)}{\cot\left(x\right)}$

$\int\cos^5\left(-7x\right)dx$