$2x+5=x+2$

$\int_1^2\left(x^2y^2\right)dx$

$6x\left(6x-y\right)-4\left(-y-6x\right)$

$7,5\cdot5$

$\lim_{x\to a}\left(\frac{\left(x-a\right)cos\left(\pi\:a\right)}{x^2sin\left(\pi\:a\right)}\right)$

$c^2-12c+6$

$\tan\left(x\right)=\frac{\sin^3\left(x\right)}{\cos\left(x\right)-\cos^3\left(x\right)}$