$\lim_{x\to1}\frac{\left(3ln\left(x\right)-3x+1\right)}{\left(cos\left(x-1\right)-1\right)}$

$m^3y+m^3t\:$

$y\:+\:50\:-\:15$

$0.00421\cdot1.000$

$36x^1^0y^{18}-8x^5y^9z+\frac{4}{9}z^2$

$f\left(x\right)=x^7-2x^6+3x$

$\frac{dy}{dx}=\frac{\left(x-1\right)\cdot\left(y+3\right)}{\left(x+4\right)\cdot\left(y-2\right)}9$