$\left(8x^2-2x+1\right)-\left(3x^2+5x-8\right)$

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

$\lim_{x\to0}\left(-\cos\left(x\right)^{sinx}\right)$

$13x^2+2x=3$

$\left(-20\right)-\left(+6\right)-\left(-15\right)$

$\left(5a+b\right)\left(25a^2-5ab+b^2\right)$

$192+10-100$