$3x^2-38x+43$

$\left(\frac{2}{3}x-\frac{3}{5}y\right)^3$

$tan\left(\frac{\pi\:}{4}-x\right)=\frac{\cos\:\left(x\right)-\sin\:\left(x\right)}{\cos\:\left(x\right)+\sin\:\left(x\right)}$

$\int_1^4\left(\frac{x^2}{x^2-6x+5}\right)dx$

$2x^2-12+11$

$x^2-4x-12<0$

$\sqrt[2]{\frac{54}{2}}$