$4x^2+6x=12$

$-5a+3b-8c-6a+11b-4c-7c+8a+10b$

$\int_0^l\left(\left(h+p\right)\cdot x^2+hl^2+pl^2-pl\cdot x+h\cdot x^2\right)dx$

$cot\left(x\right)sin\left(2x\right)=2\left(1-sin^2\left(x\right)\right)$

$\left(a+\frac{2}{\:3}\right)\left(a-\frac{5}{6}\right)$

$1,21m^6b^4-1,44a^8x^2$

$\lim_{x\to1}\left(\frac{x^2+\left(x-1\right)sin\pi x-2x-1}{e^{x-1}\:-x}\right)$