Приведите подобные слагаемые и раскройте скобки в предложенных выражениях.

Ответы к заданиям на приведение подобных слагаемых и раскрытие скобок: 1. $-12c + 15x^2 - 12c - 2x^2 + 3x^2 = (-12c - 12c) + (15x^2 - 2x^2 + 3x^2) = -24c + 16x^2$ 2. $-10g - 8r - r + 11g - 5r = (-10g + 11g) + (-8r - r - 5r) = g - 14r$ 3. $-2d - 3d - 7t^3 + 7t^3 - 9t^3 = (-2d - 3d) + (-7t^3 + 7t^3 - 9t^3) = -5d - 9t^3$ 4. $10m - 5m - v^2 - m + 5v^2 = (10m - 5m - m) + (-v^2 + 5v^2) = 4m + 4v^2$ 5. $8c + 2h + 14h - 7c - 15c = (8c - 7c - 15c) + (2h + 14h) = -14c + 16h$ 6. $8t^3(9c + 8) = 8t^3 \cdot 9c + 8t^3 \cdot 8 = 72t^3c + 64t^3$ 7. $6h(-4c + 2) = 6h \cdot (-4c) + 6h \cdot 2 = -24hc + 12h$ 8. $5k^2(-8f^3 - 5) = 5k^2 \cdot (-8f^3) + 5k^2 \cdot (-5) = -40k^2f^3 - 25k^2$ 9. $-4p(-3k^2 + 2) = -4p \cdot (-3k^2) + (-4p) \cdot 2 = 12pk^2 - 8p$ 10. $6r(-4z^3 + 3) = 6r \cdot (-4z^3) + 6r \cdot 3 = -24rz^3 + 18r$ 11. $6u^2(-6u - 4) = 6u^2 \cdot (-6u) + 6u^2 \cdot (-4) = -36u^3 - 24u^2$ 12. $6h(-6h^3 - 6) = 6h \cdot (-6h^3) + 6h \cdot (-6) = -36h^4 - 36h$ 13. $-3h^3(-7h^3 + 2) = -3h^3 \cdot (-7h^3) + (-3h^3) \cdot 2 = 21h^6 - 6h^3$ 14. $7n^2(-6n + 5) = 7n^2 \cdot (-6n) + 7n^2 \cdot 5 = -42n^3 + 35n^2$ 15. $-5h^3(3h - 6) = -5h^3 \cdot 3h - 5h^3 \cdot (-6) = -15h^4 + 30h^3$ 16. $(8f - 1)(3f + 7) = 24f^2 + 56f - 3f - 7 = 24f^2 + 53f - 7$ 17. $(-4y + 8)(2y + 2) = -8y^2 - 8y + 16y + 16 = -8y^2 + 8y + 16$ 18. $(v - 5)(-3v - 2) = -3v^2 - 2v + 15v + 10 = -3v^2 + 13v + 10$ 19. $(-9b - 3)(-8b - 3) = 72b^2 + 27b + 24b + 9 = 72b^2 + 51b + 9$ 20. $(-4d + 9)(-3d + 9) = 12d^2 - 36d - 27d + 81 = 12d^2 - 63d + 81$