$x-0.2=1+1.8x$

$\int_{-1}^3\left(10x\right)dx$

$\frac{d}{dx}\:sinx^{5x^3-8x+15}$

$\lim_{x\to4}\left(x^3-4x+1\right)$

$\frac{2}{3}a^2+\frac{1}{2}\:ab\:-\:2ab^2-\:\frac{3}{4}ab\:+\:\frac{1}{3}a^2\:-\:\frac{3}{5}b^2$

$-x^3+2x^2+5x+1-3x^2+2$

$\:y'=2cos\left(x\right)-tan\left(x\right)y$