$4\left(5x-3\right)-7x=3\left(6x-4\right)+10$

$\left\{x+2y\right\}\left\{5x-3y\right\}$

$21 x + 11 + 1$

$cos^5\left(x\right)tan^5\left(x\right)$

$-2x+1>5$

$\left(-10-3\left(3^2-20\right)\right)\left(1-6+3\left|\left(-2\right)-1\right|\right)-10$

$\left(x^2+y\right)\cdot dx+x\cdot dy=0$