1. ∫(4x²+x⁵+3) dx 2. ∫(6x⁵-2x³+x-1) dx 3. ∫(5/3*x⁴-x⁶+4x-8) dx
1. = 4/3*x^3+1/6*x^6+3*x + C 2. = x^5-1/2*x^4+1/2*x^2-x + C 3. = 1/3*x^5-1/7*x^7+1/2*x^2-8*x + C