$7x\:-\:y\:-\:z\:-\:x\:-\:y\:+\:z$

$0.052+0.040$

$6\left(\sin^2x+2\cos^2x\right)$

$\frac{d^3}{dy^3}\left(y^4+3y-4x^3=5x+1\right)$

$-\lim_{x\to-4}\left|x+4\right|$

$\frac{dy}{dx}\left(x^x\right)\frac{\sin\left(x\right)\cos\left(x\right)\tan^3\left(x\right)}{\sqrt{x}}$

$\left(b+3\right)^2-6\left(b+3\right)^2+1$